CN215999361U

CN215999361U - Valve rod sealing ring mounting mechanism

Info

Publication number: CN215999361U
Application number: CN202122459597.4U
Authority: CN
Inventors: 杨文贵; 黎文斌; 刘生君; 熊运飞
Original assignee: Jiaxing Da Ding Automation Technology Co ltd
Current assignee: Jiaxing Da Ding Automation Technology Co ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-03-11
Anticipated expiration: 2031-10-12

Abstract

The utility model discloses a valve rod sealing ring mounting mechanism, which comprises a frame, a support, a turntable mechanism, a sealing ring vibration feeding machine, a sealing ring conveying track and a sealing ring assembling mechanism, wherein the upper end of the sealing ring conveying track is connected with the discharge end of the sealing ring vibration feeding machine, and the lower end of the sealing ring conveying track is fixed with the support; a plurality of supporting stations are circumferentially arranged on the turntable mechanism, and each supporting station comprises a valve body supporting seat for supporting the valve body; the sealing ring vibration feeding machine is used for conveying the sealing rings in the sealing ring vibration feeding machine to the sealing ring conveying track; the sealing ring assembly mechanism is used for assembling the sealing ring from the sealing ring conveying track into a valve rod mounting hole on the valve body; the utility model discloses can improve the assembly efficiency of sealing washer and the production efficiency of ball valve, and can reduce the cost of labor of enterprise.

Description

Valve rod sealing ring mounting mechanism

Technical Field

The utility model relates to a ball valve automatic assembly equipment technical field, concretely relates to valve rod seal installation mechanism.

Background

In the ball valve production process, need assemble the sealing washer in the valve rod mounting hole on the valve body, the process of assembling the sealing washer in the valve rod mounting hole at present relies on the manual work to accomplish, need install the sealing washer in the valve rod mounting hole on the valve body through artificial mode promptly at present to there are the shortcoming that sealing washer assembly efficiency is low and ball valve production efficiency is low, but also there is the shortcoming that the cost of labor of enterprise is high.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a valve rod seal installation mechanism, its assembly efficiency that can improve the sealing washer and the production efficiency of ball valve, and can reduce the cost of labor of enterprise.

The utility model discloses a valve rod sealing ring installation mechanism, including frame, support, carousel mechanism, sealing washer vibrations material loading machine, sealing washer delivery track and sealing washer assembly devices, support and carousel mechanism all install in the frame, and sealing washer vibrations material loading machine and sealing washer assembly devices all install on the support, and the upper end of sealing washer delivery track is connected with the discharge end of sealing washer vibrations material loading machine, and the lower extreme of sealing washer delivery track is fixed with the support; a plurality of supporting stations are circumferentially arranged on the turntable mechanism, and each supporting station comprises a valve body supporting seat for supporting the valve body; the sealing ring vibration feeding machine is used for conveying the sealing rings in the sealing ring vibration feeding machine to the sealing ring conveying track; the sealing ring conveying track is used for conveying the sealing ring to the sealing ring assembling mechanism, and the sealing ring assembling mechanism is used for assembling the sealing ring from the sealing ring conveying track to a valve rod mounting hole on the valve body.

The utility model discloses a valve rod sealing washer installation mechanism, wherein, carousel mechanism includes carousel, carousel decollator and gear motor, and the carousel decollator is fixed in the frame, and gear motor is fixed with the carousel decollator and gear motor's output shaft is connected with the input shaft transmission of carousel decollator, and the carousel is fixed on the output shaft of carousel decollator, and the valve body supporting seat in every support station is all fixed on the carousel; after adopting this kind of structure, when gear motor during operation, gear motor can drive carousel decollator work, carousel decollator during operation can drive the carousel and carry out intermittent type nature and rotate, at carousel intermittent type nature pivoted in-process, the carousel can remove the valve body of not assembling the sealing washer to sealing washer assembly devices department, and can remove the valve body after assembling the sealing washer from sealing washer assembly devices department, so, can make sealing washer assembly devices continuously assemble the sealing washer to the valve body, thereby can improve the sealing washer assembly efficiency of valve body.

The utility model discloses a valve rod sealing ring installation mechanism, wherein, sealing ring assembly devices includes sealing ring temporary storage unit and sealing ring assembly unit, and sealing ring temporary storage unit includes first cylinder and temporary storage seat, and sealing ring assembly unit includes second cylinder, third cylinder, sliding seat, inserted bar and top cover; the first air cylinder is fixed on the support, the temporary storage seat is fixed with the driving end of the first air cylinder, a temporary storage groove for temporarily storing a sealing ring is formed in the temporary storage seat, a first opening for allowing the sealing ring from the sealing ring conveying rail to fall into the temporary storage groove is formed in the upper end of the temporary storage groove, the first air cylinder is used for driving the temporary storage seat to slide along the radial direction of the inserted rod, after a piston rod of the first air cylinder extends, the axis of the sealing ring in the temporary storage groove is overlapped with the axis of the inserted rod, and after the piston rod of the first air cylinder contracts, the first opening is vertically aligned with the discharge end of the sealing ring conveying rail; the second cylinder and the third cylinder are fixed on the support, the sliding seat is connected to the support in a sliding mode, the inserted rod is movably arranged in the ejector sleeve in a penetrating mode, one end of the inserted rod is fixed with a piston rod of the second cylinder, one end of the ejector sleeve is fixed with the sliding seat, the sliding seat is fixed with a piston rod of the third cylinder, the second cylinder is used for driving the inserted rod to move along the axial direction of the sealing ring located in the temporary storage groove, and the third cylinder is used for driving the sliding seat and the ejector sleeve to enable the sliding seat and the ejector sleeve to move along the axial direction of the sealing ring located in the temporary storage groove; the temporary storage seat is internally provided with a through hole communicated with the temporary storage groove, after a piston rod of the first air cylinder extends, and when a piston rod of the second air cylinder extends, the through hole and the sealing ring positioned in the temporary storage groove are used for allowing the insertion rod to pass through so that the sealing ring positioned in the temporary storage groove is sleeved outside the insertion rod, and the inner diameter of the through hole is smaller than the outer diameter of the sealing ring; a second opening is formed in the side wall of the temporary storage groove, and after a piston rod of the second air cylinder extends and when a piston rod of the first air cylinder contracts, the second opening is used for enabling the insert rod and a sealing ring sleeved outside the insert rod to slide out of the temporary storage seat laterally; when a piston rod of the third cylinder extends, the third cylinder is used for driving the sliding seat and the jacking sleeve to move along the axial direction of the inserted rod so that the jacking sleeve presses the sealing ring positioned outside the inserted rod into the valve rod mounting hole positioned on the valve body; the temporary storage seat is rotatably connected with a rotating frame, one end of the rotating frame is used for shielding the second opening, an elastic structure is arranged between the other end of the rotating frame and the temporary storage seat, and the elastic structure is used for driving the rotating frame to rotate so that one end of the rotating frame shields the second opening; after the sealing ring assembling mechanism is adopted, when a piston rod of a first air cylinder contracts, a temporary storage groove on a temporary storage seat can be vertically aligned with a discharge end of a sealing ring conveying track, at the moment, a sealing ring in the sealing ring conveying track can fall into the temporary storage groove through a first opening, after a piston rod of the first air cylinder extends, and when a piston rod of a second air cylinder extends, an inserted rod can penetrate through the sealing ring in the temporary storage groove and then be inserted into a valve rod mounting hole in a valve body, after the piston rod of the second air cylinder extends, and when the piston rod of the first air cylinder contracts, the inserted rod and the sealing ring in the temporary storage groove can slide out from the temporary storage groove through a second opening in a lateral direction, after the inserted rod and the sealing ring slide out from the temporary storage groove in the lateral direction, one end of a rotating frame can shield the second opening under the action of an elastic structure, when the piston rod of a third air cylinder extends, the third cylinder can drive the sliding seat and the ejector sleeve to move along the axial direction of the inserted rod so that the ejector sleeve presses the sealing ring positioned outside the inserted rod into the valve rod mounting hole positioned on the valve body.

The utility model discloses a valve rod sealing ring installation mechanism, wherein, the elastic structure includes a spring, one end of the spring is propped against the temporary storage seat, the other end of the spring is propped against the other end of the rotating frame, the other end of the rotating frame is provided with a blind hole for inserting the other end part of the spring; after the spring is used as the elastic structure, under the action of the spring, the spring can drive the rotating frame to rotate so that one end of the rotating frame has the tendency of rotating towards one side of the second opening and blocking the second opening, namely, one end of the rotating frame can block the second opening under the action of the spring.

The utility model discloses a valve rod sealing ring installation mechanism, wherein, the upper end of the temporary storage seat is provided with a chute, the chute extends along the sliding direction of the temporary storage seat, the chute is used for embedding the sealing ring part from the sealing ring conveying track, and one end of the chute is communicated with a first opening; through the setting of spout, when the piston rod of first cylinder extends, come from the orbital sealing washer of sealing washer delivery into the spout, when the piston rod of first cylinder contracts, the sealing washer that is arranged in the spout can enter into the groove of keeping in through first opening, so, can make and come from orbital sealing washer delivery and conveniently supply to the groove of keeping in.

The utility model discloses a valve rod sealing ring mounting mechanism, wherein, a pair of slide blocks is fixed on the sliding seat, slide rails which are in one-to-one correspondence with each slide block are fixed on the bracket, and each slide block is connected on the corresponding slide rail in a sliding way; by adopting the structure, the sliding seat can be reliably connected to the bracket in a sliding way.

The utility model discloses a valve rod sealing ring installation mechanism, wherein, be located the frame of carousel below and be fixed with a plurality of support columns that are circumference evenly distributed, the upper end of every support column all rotates and is connected with the gyro wheel, the axis of every gyro wheel all is perpendicular with the axis of carousel, the upper end of every gyro wheel all leans on with the lower terminal surface of carousel; after adopting this kind of structure, under the effect of support column and gyro wheel, the gyro wheel can realize the reliable support to the carousel to avoid the carousel phenomenon of slope to appear, reliability and stability when thus can improve the carousel and rotate.

The utility model discloses an in the valve rod mounting hole of mechanized mode on assembling the valve body with the sealing washer, adopt the manual work to compare the mode in the valve rod mounting hole on assembling the valve body with the sealing washer with the tradition, can improve the assembly efficiency of sealing washer and the production efficiency of ball valve, and can reduce the cost of labor of enterprise.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic view of a first three-dimensional structure of the present invention;

fig. 2 is a schematic view of a second three-dimensional structure of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 1;

FIG. 4 is an enlarged view of the structure at B in FIG. 2;

fig. 5 is a schematic view of a first three-dimensional structure of the sealing ring vibration feeder, the sealing ring conveying rail and the sealing ring assembling mechanism after being mounted on the bracket;

FIG. 6 is an enlarged view of the structure at C in FIG. 5;

fig. 7 is a schematic view of a second three-dimensional structure of the sealing ring vibration feeding machine, the sealing ring conveying rail and the sealing ring assembling mechanism after being installed on the support.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for description purposes, not specifically referring to the order or sequence, and are not intended to limit the present invention, but only to distinguish the components or operations described in the same technical terms, and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model discloses a valve rod sealing ring installation mechanism, including frame 1, support 11, carousel mechanism, sealing washer vibrations material loading machine 2, sealing washer delivery track 3 and sealing washer assembly devices, support 11 and carousel mechanism all install on frame 1, and sealing washer vibrations material loading machine 2 and sealing washer assembly devices all install on support 11, and the upper end of sealing washer delivery track 3 is connected with the discharge end of sealing washer vibrations material loading machine 2, and the lower extreme of sealing washer delivery track 3 is fixed with support 11; a plurality of supporting stations 4 are circumferentially arranged on the turntable mechanism, and each supporting station 4 comprises a valve body supporting seat 41 for supporting the valve body 5; the sealing ring vibration feeding machine 2 is used for conveying the sealing ring 6 in the sealing ring vibration feeding machine 2 to the sealing ring conveying track 3; the packing transfer rail 3 is used to transfer the packing 6 to a packing fitting mechanism for fitting the packing 6 from the packing transfer rail 3 into the valve stem mounting hole 51 on the valve body 5.

The turntable mechanism comprises a turntable 71, a turntable divider 72 and a speed reducing motor 73, the turntable divider 72 is fixed on the frame 1, the speed reducing motor 73 is fixed with the turntable divider 72, an output shaft of the speed reducing motor 73 is in transmission connection with an input shaft of the turntable divider 72, the turntable 71 is fixed on the output shaft of the turntable divider 72, and the valve body support seat 41 in each support station 4 is fixed on the turntable 71; after adopting this kind of structure, when gear motor during operation, gear motor can drive carousel decollator work, carousel decollator during operation can drive the carousel and carry out intermittent type nature and rotate, at carousel intermittent type nature pivoted in-process, the carousel can remove the valve body of not assembling the sealing washer to sealing washer assembly devices department, and can remove the valve body after assembling the sealing washer from sealing washer assembly devices department, so, can make sealing washer assembly devices continuously assemble the sealing washer to the valve body, thereby can improve the sealing washer assembly efficiency of valve body.

The sealing ring assembling mechanism comprises a sealing ring temporary storage unit and a sealing ring assembling unit, the sealing ring temporary storage unit comprises a first air cylinder 81 and a temporary storage seat 82, and the sealing ring assembling unit comprises a second air cylinder 83, a third air cylinder 84, a sliding seat 85, an inserted rod 86 and a top sleeve 87; the first air cylinder 81 is fixed on the support 11, the temporary storage seat 82 is fixed with a driving end of the first air cylinder 81, a temporary storage groove 821 for temporarily storing the sealing ring 6 is arranged on the temporary storage seat 82, a first opening 822 for allowing the sealing ring 6 from the sealing ring conveying track 3 to fall into the temporary storage groove 821 is arranged at the upper end of the temporary storage groove 821, the first air cylinder 81 is used for driving the temporary storage seat 82 to slide along the radial direction of the insertion rod 86, after a piston rod of the first air cylinder 81 extends, the axis of the sealing ring 6 in the temporary storage groove 821 is overlapped with the axis of the insertion rod 86, and after the piston rod of the first air cylinder 81 contracts, the first opening 822 is vertically aligned with the discharge end of the sealing ring conveying track 3; the second air cylinder 83 and the third air cylinder 84 are both fixed on the support 11, the sliding seat 85 is slidably connected on the support 11, the insertion rod 86 is movably arranged in the top sleeve 87 in a penetrating manner, one end of the insertion rod 86 is fixed with a piston rod of the second air cylinder 83, one end of the top sleeve 87 is fixed with the sliding seat 85, the sliding seat 85 is fixed with a piston rod of the third air cylinder 84, the second air cylinder 83 is used for driving the insertion rod 86 to move along the axial direction of the sealing ring 6 in the temporary storage groove 821, and the third air cylinder 84 is used for driving the sliding seat 85 and the top sleeve 87 to enable the sliding seat 85 and the top sleeve 87 to move along the axial direction of the sealing ring 6 in the temporary storage groove 821; a through hole 823 communicated with the temporary storage groove 821 is formed in the temporary storage seat 82, after a piston rod of the first air cylinder 81 extends, and when a piston rod of the second air cylinder 83 extends, the through hole 823 and the sealing ring 6 in the temporary storage groove 821 are used for allowing the insertion rod 86 to penetrate through so that the sealing ring 6 in the temporary storage groove 821 is sleeved outside the insertion rod 86, and the inner diameter of the through hole 823 is smaller than the outer diameter of the sealing ring 6; a second opening 824 is formed in the side wall of the temporary storage groove 821, and after the piston rod of the second cylinder 83 extends, and when the piston rod of the first cylinder 81 contracts, the second opening 824 is used for allowing the insertion rod 86 and the sealing ring 6 sleeved outside the insertion rod 86 to slide out of the temporary storage seat 82 in the lateral direction; when the piston rod of the third air cylinder 84 is extended, the third air cylinder 84 is used for driving the sliding seat 85 and the top sleeve 87 to move along the axial direction of the inserted rod 86 so that the top sleeve 87 presses the sealing ring 6 positioned outside the inserted rod 86 into the valve rod mounting hole 51 positioned on the valve body 5; the temporary storage seat 82 is rotatably connected with a rotating frame 88, one end of the rotating frame 88 is used for shielding the second opening 824, and an elastic structure is arranged between the other end of the rotating frame 88 and the temporary storage seat 82 and used for driving the rotating frame 88 to rotate so as to enable one end of the rotating frame 88 to shield the second opening 824; after the sealing ring assembling mechanism is adopted, when a piston rod of a first air cylinder contracts, a temporary storage groove on a temporary storage seat can be vertically aligned with a discharge end of a sealing ring conveying track, at the moment, a sealing ring in the sealing ring conveying track can fall into the temporary storage groove through a first opening, after a piston rod of the first air cylinder extends, and when a piston rod of a second air cylinder extends, an inserted rod can penetrate through the sealing ring in the temporary storage groove and then be inserted into a valve rod mounting hole in a valve body, after the piston rod of the second air cylinder extends, and when the piston rod of the first air cylinder contracts, the inserted rod and the sealing ring in the temporary storage groove can slide out from the temporary storage groove through a second opening in a lateral direction, after the inserted rod and the sealing ring slide out from the temporary storage groove in the lateral direction, one end of a rotating frame can shield the second opening under the action of an elastic structure, when the piston rod of a third air cylinder extends, the third cylinder can drive the sliding seat and the ejector sleeve to move along the axial direction of the inserted rod so that the ejector sleeve presses the sealing ring positioned outside the inserted rod into the valve rod mounting hole positioned on the valve body.

The elastic structure comprises a spring 89, one end of the spring 89 abuts against the temporary storage seat 82, the other end of the spring 89 abuts against the other end of the rotating frame 88, and the other end of the rotating frame 88 is provided with a blind hole 881 for inserting the other end part of the spring 89; after the spring is used as the elastic structure, under the action of the spring, the spring can drive the rotating frame to rotate so that one end of the rotating frame has the tendency of rotating towards one side of the second opening and blocking the second opening, namely, one end of the rotating frame can block the second opening under the action of the spring.

The upper end of the temporary storage seat 82 is provided with a sliding chute 825, the sliding chute 825 extends along the sliding direction of the temporary storage seat 82, the sliding chute 825 is used for partially embedding the sealing ring 6 from the sealing ring conveying track 3, and one end of the sliding chute 825 is communicated with the first opening 822; through the setting of spout, when the piston rod of first cylinder extends, come from the orbital sealing washer of sealing washer delivery into the spout, when the piston rod of first cylinder contracts, the sealing washer that is arranged in the spout can enter into the groove of keeping in through first opening, so, can make and come from orbital sealing washer delivery and conveniently supply to the groove of keeping in.

A pair of sliding blocks 851 is fixed on the sliding seat 85, sliding rails 111 corresponding to the sliding blocks 851 one by one are fixed on the bracket 11, and each sliding block 851 is connected to the corresponding sliding rail 111 in a sliding manner; by adopting the structure, the sliding seat can be reliably connected to the bracket in a sliding way.

A plurality of support columns 12 which are uniformly distributed in the circumferential direction are fixed on the machine frame 1 below the rotary disc 71, the upper end of each support column 12 is rotatably connected with a roller 13, the axis of each roller 13 is vertical to the axis of the rotary disc 71, and the upper end of each roller 13 is abutted against the lower end face of the rotary disc 71; after adopting this kind of structure, under the effect of support column and gyro wheel, the gyro wheel can realize the reliable support to the carousel to avoid the carousel phenomenon of slope to appear, reliability and stability when thus can improve the carousel and rotate.

When the utility model works, firstly, the valve body of the sealing ring to be installed on the valve body supporting seat is rotated to the position of the sealing ring assembling mechanism by the turntable in the turntable mechanism, then the piston rod of the first air cylinder extends to enable the axis of the sealing ring in the temporary storage groove on the supporting block to coincide with the axis of the valve rod mounting hole on the valve body of the sealing ring to be installed, then the piston rod of the second air cylinder extends to enable the inserted rod to pass through the sealing ring in the temporary storage groove and then to be inserted into the valve rod mounting hole on the valve body, then the piston rod of the first air cylinder contracts, when the piston rod of the first air cylinder contracts, the inserted rod and the sealing ring in the temporary storage groove can slide out from the temporary storage groove through the second opening in the lateral direction (the sealing ring in the temporary storage groove can push one end of the rotating frame so as to enable one end of the rotating frame to remove the shielding of the second opening, when the sealing ring slides out from the temporary storage groove, one end of the rotating frame can realize the shielding of the second opening again under the action of the spring, and in addition, after the piston rod of the first cylinder is completely contracted, the sealing ring from the sealing ring conveying track can fall into the temporary storage groove, i.e. the complement to the sealing ring is realized), then, the piston rod of the third cylinder extends, when the piston rod of the third cylinder extends, the third cylinder can drive the sliding seat and the ejector sleeve to move along the axial direction of the inserted rod so that the ejector sleeve presses the sealing ring positioned outside the inserted rod into the valve rod mounting hole positioned on the valve body, and finally, the turntable in the turntable mechanism can move the next valve body which is not provided with the sealing ring to the position of the sealing ring assembling mechanism, and can move the valve body which is provided with the sealing ring away from the sealing ring assembling mechanism.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a valve rod sealing washer installation mechanism which characterized in that: the sealing ring vibration feeding machine comprises a rack (1), a support (11), a turntable mechanism, a sealing ring vibration feeding machine (2), a sealing ring conveying rail (3) and a sealing ring assembling mechanism, wherein the support (11) and the turntable mechanism are both installed on the rack (1), the sealing ring vibration feeding machine (2) and the sealing ring assembling mechanism are both installed on the support (11), the upper end of the sealing ring conveying rail (3) is connected with the discharge end of the sealing ring vibration feeding machine (2), and the lower end of the sealing ring conveying rail (3) is fixed with the support (11); a plurality of supporting stations (4) are circumferentially arranged on the turntable mechanism, and each supporting station (4) comprises a valve body supporting seat (41) for supporting a valve body (5); the sealing ring vibration feeding machine (2) is used for conveying the sealing rings (6) in the sealing ring vibration feeding machine (2) to the sealing ring conveying track (3); the sealing ring conveying track (3) is used for conveying the sealing ring (6) to a sealing ring assembling mechanism, and the sealing ring assembling mechanism is used for assembling the sealing ring (6) from the sealing ring conveying track (3) to a valve rod mounting hole (51) on the valve body (5).

2. The valve rod sealing ring mounting mechanism is characterized in that the rotary table mechanism comprises a rotary table (71), a rotary table splitter (72) and a speed reducing motor (73), the rotary table splitter (72) is fixed on the frame (1), the speed reducing motor (73) is fixed with the rotary table splitter (72), an output shaft of the speed reducing motor (73) is in transmission connection with an input shaft of the rotary table splitter (72), the rotary table (71) is fixed on the output shaft of the rotary table splitter (72), and a valve body supporting seat (41) in each supporting station (4) is fixed on the rotary table (71).

3. The valve rod sealing ring mounting mechanism according to claim 1, wherein the sealing ring assembling mechanism comprises a sealing ring temporary storage unit and a sealing ring assembling unit, the sealing ring temporary storage unit comprises a first air cylinder (81) and a temporary storage seat (82), and the sealing ring assembling unit comprises a second air cylinder (83), a third air cylinder (84), a sliding seat (85), an inserted rod (86) and a top sleeve (87); the first air cylinder (81) is fixed on the bracket (11), the temporary storage seat (82) is fixed with the driving end of the first air cylinder (81), a temporary storage groove (821) for temporarily storing the sealing ring (6) is arranged on the temporary storage seat (82), the upper end of the temporary storage groove (821) is provided with a first opening (822) for the sealing ring (6) from the sealing ring conveying track (3) to fall into the temporary storage groove (821), the first air cylinder (81) is used for driving the temporary storage seat (82) to slide along the radial direction of the insert rod (86), after the piston rod of the first air cylinder (81) is extended, the axis of the sealing ring (6) positioned in the temporary storage groove (821) is coincided with the axis of the inserted rod (86), after a piston rod of the first air cylinder (81) contracts, the first opening (822) is vertically aligned with the discharge end of the sealing ring conveying track (3); the second air cylinder (83) and the third air cylinder (84) are fixed on a support (11), the sliding seat (85) is connected on the support (11) in a sliding mode, the insertion rod (86) is movably arranged in the top sleeve (87) in a penetrating mode, one end of the insertion rod (86) is fixed with a piston rod of the second air cylinder (83), one end of the top sleeve (87) is fixed with the sliding seat (85), the sliding seat (85) is fixed with a piston rod of the third air cylinder (84), the second air cylinder (83) is used for driving the insertion rod (86) to move along the axial direction of the sealing ring (6) located in the temporary storage groove (821), and the third air cylinder (84) is used for driving the sliding seat (85) and the top sleeve (87) to enable the sliding seat (85) and the top sleeve (87) to move along the axial direction of the sealing ring (6) located in the temporary storage groove (821); a through hole (823) communicated with a temporary storage groove (821) is formed in the temporary storage seat (82), after a piston rod of the first air cylinder (81) extends, and when a piston rod of the second air cylinder (83) extends, the through hole (823) and a sealing ring (6) located in the temporary storage groove (821) are used for allowing an insertion rod (86) to penetrate through so that the sealing ring (6) located in the temporary storage groove (821) is sleeved outside the insertion rod (86), and the inner diameter of the through hole (823) is smaller than the outer diameter of the sealing ring (6); a second opening (824) is formed in the side wall of the temporary storage groove (821), after a piston rod of the second air cylinder (83) extends, and when the piston rod of the first air cylinder (81) contracts, the second opening (824) is used for laterally sliding the insertion rod (86) and a sealing ring (6) sleeved outside the insertion rod (86) out of the temporary storage seat (82); when a piston rod of the third air cylinder (84) is extended, the third air cylinder (84) is used for driving the sliding seat (85) and the top sleeve (87) to move along the axial direction of the inserted rod (86) so that the top sleeve (87) presses the sealing ring (6) positioned outside the inserted rod (86) into the valve rod mounting hole (51) positioned on the valve body (5); the buffer storage device is characterized in that a rotating frame (88) is connected to the temporary storage seat (82) in a rotating mode, one end of the rotating frame (88) is used for shielding the second opening (824), an elastic structure is arranged between the other end of the rotating frame (88) and the temporary storage seat (82), and the elastic structure is used for driving the rotating frame (88) to rotate so that one end of the rotating frame (88) can shield the second opening (824).

4. The valve stem gasket mounting mechanism according to claim 3, wherein the elastic structure comprises a spring (89), one end of the spring (89) abuts against the temporary storage seat (82), the other end of the spring (89) abuts against the other end of the rotating frame (88), and the other end of the rotating frame (88) is provided with a blind hole (881) for inserting the other end part of the spring (89).

5. The valve stem gasket mounting mechanism according to claim 3, wherein the temporary storage seat (82) is provided at an upper end thereof with a slide groove (825), the slide groove (825) extends along a sliding direction of the temporary storage seat (82), the slide groove (825) is used for partially embedding the gasket (6) from the gasket conveying rail (3), and one end of the slide groove (825) is communicated with the first opening (822).

6. The valve rod sealing ring installation mechanism of claim 3, wherein a pair of sliding blocks (851) are fixed on the sliding seat (85), sliding rails (111) corresponding to each sliding block (851) are fixed on the bracket (11), and each sliding block (851) is connected to the corresponding sliding rail (111) in a sliding manner.

7. The valve rod sealing ring installation mechanism is characterized in that a plurality of support columns (12) which are uniformly distributed in the circumferential direction are fixed on the machine frame (1) below the rotary disc (71), the upper end of each support column (12) is rotatably connected with a roller (13), the axis of each roller (13) is perpendicular to the axis of the rotary disc (71), and the upper end of each roller (13) abuts against the lower end face of the rotary disc (71).