Thick small-size valve rod sealing ring mounting machine tool

Abstract

The utility model discloses a thick small-size valve rod sealing ring installation machine tool which comprises a supporting sleeve, a pushing sleeve and a guide rod, a sleeve hole of the supporting sleeve comprises a threaded hole and a stepped hole which are coaxial up and down, and the upper end portion of a valve rod is limited in the stepped hole downwards in the axial direction. The pushing and pressing sleeve comprises a guide part and an external thread part which are coaxial up and down, and sleeve holes of the pushing and pressing sleeve comprise a guide hole and an avoiding hole which are coaxial up and down; the guide rod comprises a rod body and a cone which are coaxial up and down, the cone has a small upper part and a large lower part, and the thick small-size sealing ring is sleeved on the upper part of the cone from the rod body; a rod body of the guide rod is matched with a guide hole of the pushing sleeve, an external thread part of the pushing sleeve is screwed in a threaded hole of the supporting sleeve, the lower portion of a cone of the guide rod abuts against the umbrella-shaped top end of the valve rod, the pushing sleeve is screwed down, and the thick small-size sealing ring is downwards pushed to the valve rod along the cone through the external thread part. And the thick small-size sealing ring crosses over the umbrella-shaped top end and is clamped and embedded in a sealing groove formed in the valve rod.

Description

Technical Field

[0001] The utility model relates to a sealing ring assembly technology, in particular to a thick small-size valve stem sealing ring installation machine. Background Art

[0002] Regarding the problem of how to smoothly install the sealing ring on the piston, the utility model patent with authorization publication number CN 203374778U proposes a "guide sleeve for installing an "O"-ring on a piston". In its technical solution, the guide sleeve is designed as a conical structure, the top cross-sectional diameter of which is smaller than the inner diameter of the "O"-ring, and the bottom is fixedly connected to the piston, pulling the "O"-ring to smoothly enter the piston ring groove along the conical surface of the guide sleeve.

[0003] However, for some special sealing rings, such as the Krones wine machines and Guangerqing wine machines used by the applicant's company, the valve stems in each wine machine are sealed with a thick small-sized sealing ring with a thickness of 5mm and an inner hole of ￠7mm. The inner hole of the sealing ring needs to be expanded to exceed the outer diameter of the umbrella-shaped end of the valve stem (￠13mm) before it can be inserted into the sealing groove from the umbrella-shaped end of the valve stem.

[0004] Since the thickness of thick small-sized sealing rings is very close to their inner diameter, it is very difficult to expand the inner hole from ￠7mm to ￠13mm and squeeze it into the sealing groove of the valve stem. This requires great effort and the use of instruments to complete. The installation is extremely difficult, time-consuming, and labor-intensive, and the sealing groove is easily damaged. Even if the patented technology of "Guide sleeve for installing O-rings on pistons" is used, it will not be easy due to limited manpower. Utility Model Content

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to propose a thick small-size valve stem sealing ring installation tool that can achieve fast, convenient and non-destructive assembly.

[0006] A thick small-size valve stem seal ring installation tool capable of solving the above technical problems comprises a support sleeve, a push sleeve and a guide rod, wherein:

[0007] 1. The sleeve hole of the support sleeve includes upper and lower coaxial threaded holes and a stepped hole, and the upper end of the valve stem is axially limited downward in the stepped hole.

[0008] 2. The pushing sleeve comprises upper and lower coaxial guide parts and an external threaded part, and the sleeve hole of the pushing sleeve comprises upper and lower coaxial guide holes and an avoidance hole.

[0009] 3. The guide rod comprises an upper and lower coaxial rod body and a cone, the upper part of the cone is small and the lower part is large, and a thick small-sized sealing ring is mounted on the upper part of the cone from the rod body.

[0010] 4. The rod body of the guide rod is matched with the guide hole of the pushing sleeve, the external threaded portion of the pushing sleeve is screwed into the threaded hole of the supporting sleeve, the lower part of the cone of the guide rod is against the umbrella-shaped top of the valve stem, and the pushing sleeve is tightened to push the thick small-sized sealing ring downward along the cone toward the valve stem through the external threaded portion until the thick small-sized sealing ring passes over the umbrella-shaped top and is embedded in the sealing groove opened on the valve stem.

[0011] Furthermore, a wrench position is provided on the guide portion of the pushing sleeve.

[0012] Furthermore, the thickness of the thick small-size sealing ring is 5 mm, the inner hole is ￠7 mm, and the outer diameter of the umbrella-shaped end of the valve stem is ￠13 mm.

[0013] Beneficial effects of the utility model:

[0014] The utility model discloses a thick small-size valve stem sealing ring installation tool with a simple structure, low manufacturing cost, easy use, and time-saving and labor-saving assembly. A skilled worker can complete the assembly of a thick small-size sealing ring in 10 to 20 seconds. The skill requirements for the personnel are not high and there is no risk of damaging the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of an implementation mode of the utility model, showing that the sealing ring is pressed into place.

[0016] Figure 2 for Figure 1 A schematic diagram of the structure of the sealing ring before press-fitting in an implementation manner.

[0017] Figure number identification: 1. Support sleeve; 1-1. Threaded hole; 1-2. Step hole; 2. Push sleeve; 2-1. Avoidance hole; 3. Guide rod; 4. Valve stem; 5. Thick small-size sealing ring; 5-1. Sealing groove. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with the implementation modes shown in the accompanying drawings.

[0019] The utility model discloses a thick small-size valve stem sealing ring installation tool, which comprises a supporting sleeve 1, a pushing sleeve 2 and a guide rod 3.

[0020] The sleeve hole of the support sleeve 1 includes a threaded hole 1-1 and a stepped hole 1-2 coaxially opened at the upper and lower ends. The upper hole of the stepped hole 1-2 is larger and the lower hole is smaller. Figure 1 , Figure 2 shown.

[0021] The push sleeve 2 includes an upper and lower coaxial guide portion and an external threaded portion, wherein the guide portion is small and the external threaded portion is large, and a wrench position is made on the guide portion; the sleeve hole of the push sleeve 2 includes an upper and lower coaxial guide hole and an avoidance hole 2-1, wherein the guide hole is opened in the guide portion, and the avoidance hole 2-1 is opened in the external threaded portion, such as Figure 1 , Figure 2 shown.

[0022] The guide rod 3 includes an upper and lower coaxial rod body and a cone. The upper part of the cone is small and the lower part is large. The maximum diameter of the cone is smaller than the aperture of the avoidance hole 2-1. The rod diameter of the rod body matches the aperture of the guide hole. Figure 1 , Figure 2 shown.

[0023] The steps of assembling the thick small-size sealing ring 5 (thickness of 5 mm, inner hole of ￠7 mm) on the valve stem 4 by using the utility model are as follows:

[0024] 1. Fix the support sleeve 1 on the base or frame.

[0025] 2. The upper stepped portion of the valve stem 4 is assembled in the stepped hole 1-2 of the support sleeve 1 and is axially limited downward. The umbrella-shaped top end (outer diameter is ￠13 mm) of the valve stem 4 is located at the connecting portion between the stepped hole 1-2 and the threaded hole 1-1.

[0026] 3. Put the thick small-sized sealing ring 5 on the rod body of the guide rod 3 and put it on the upper part of the cone.

[0027] 4. Press the cone of the guide rod 3 vertically downward against the umbrella-shaped top of the valve stem 4.

[0028] 5. Pass the push sleeve 2 onto the guide rod 3 (the guide rod 3 passes through the avoidance hole 2-1 and slides with the guide hole), and manually screw the external thread part into the hole opening of the threaded hole 1-1 until the bottom surface of the external thread part contacts the thick small-sized sealing ring 5.

[0029] 6. Use a wrench to tighten the push sleeve 2 at the wrench position of the guide part, and push the thick small-sized sealing ring 5 along the cone toward the valve stem 4 with the external thread downward (the aperture of the sealing ring is continuously expanded, and the cone of the guide rod 3 gradually enters the avoidance hole 2-1) until the thick small-sized sealing ring 5 passes over the umbrella-shaped top and is embedded in the sealing groove 5-1 opened on the valve stem 4 (opened on the valve stem 4 below the umbrella-shaped top).

Claims

1. A thick small-size valve stem seal installation tool, comprising a support sleeve (1), a push sleeve (2) and a guide rod (3), wherein: The sleeve hole of the support sleeve (1) comprises an upper and lower coaxial threaded hole (1-1) and a stepped hole (1-2), and the upper end of the valve stem (4) is axially limited downward in the stepped hole (1-2); The pushing sleeve (2) comprises upper and lower coaxial guide parts and an external threaded part, and the sleeve hole of the pushing sleeve (2) comprises upper and lower coaxial guide holes and an avoidance hole (2-1); The guide rod (3) comprises an upper and lower coaxial rod body and a cone, the upper part of the cone is small and the lower part is large, and a thick small-sized sealing ring (5) is sleeved on the upper part of the cone from the rod body; The rod body of the guide rod (3) is matched with the guide hole of the push sleeve (2), the external threaded portion of the push sleeve (2) is screwed into the threaded hole of the support sleeve (1), and the lower part of the cone of the guide rod (3) is against the umbrella-shaped top of the valve stem (4). The push sleeve (2) is tightened to push the thick small-sized sealing ring (5) downward along the cone toward the valve stem (4) through the external threaded portion until the thick small-sized sealing ring (5) passes over the umbrella-shaped top and is embedded in the sealing groove (5-1) opened on the valve stem (4).

2. The thick small-size valve stem seal installation tool according to claim 1 is characterized in that: A wrench position is provided on the guide portion of the pushing sleeve (2).

3. The thick small-size valve stem seal ring installation tool according to claim 1 or 2, characterized in that: The thickness of the thick small-size sealing ring (5) is 5 mm, the inner hole is ￠7 mm, and the outer diameter of the umbrella-shaped end of the valve stem (4) is ￠13 mm.

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