Combined piston head structure with particle wear resistance

Abstract

The utility model discloses a combined piston head structure with particle wear resistance, which is characterized by comprising a piston head main body fixedly connected to a piston rod, one end of the piston head main body far away from the piston rod is provided with a support ring, one side surface of the piston head is fixedly connected with a pressing ring, and a Y-shaped ring is arranged between the pressing ring and the support ring. The side face, away from the piston head body, of the pressing ring is connected with a second pressing ring, a hard particle preventing ring is arranged between the second pressing ring and the pressing ring, and the outer end of the hard particle preventing ring makes contact with the cylinder wall. The hard particle preventing ring is made of hard materials, hard particles are not prone to being clamped on the ring, the particles can be well prevented from being matched with the Y-shaped ring on the combined piston head to block water, and therefore sealing is formed. By means of the structure, the Y-shaped ring can be well protected against damage, the working cylinder can also be well protected, and the service life is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of piston structures, and particularly relates to a combined piston head structure with particle wear resistance for a cylinder block. Background Art

[0002] As Figure 1 shown in the figure, the existing combined piston head is composed of a retaining ring, a piston head main body, a Y-ring and a support ring. The Y-ring is installed on the retaining ring, the support ring is installed on the piston head main body, and the retaining ring and the piston head main body are connected by bolts. In the working condition with hard particles, the retaining ring of the piston head will first come into contact with the hard particles. After long-term contact, due to large wear of the hard particles, the Y-ring will be damaged. Once the Y-ring is damaged, the material will leak, affecting the use. In some working conditions, hard particles will get stuck at the damaged sealing ring, and as the piston moves, the particles will move linearly, further wearing the working cylinder and causing the equipment to be unable to be used normally. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a combined piston head structure that can ensure the service life in the cylinder block of the particle wear-resistant industry in view of the deficiencies in the above background art.

[0004] To achieve the above purpose, a combined piston head structure with particle wear resistance of the utility model adopts the following technical solutions:

[0005] A combined piston head structure with particle wear resistance includes a piston head main body fixedly connected to a piston rod. A support ring is provided at one end of the piston head main body away from the piston rod. A retaining ring is fixedly connected to one side surface of the piston head. A Y-ring is provided between the retaining ring and the support ring. A second retaining ring is connected to the side surface of the retaining ring away from the piston head main body. An anti-hard particle ring is provided between the second retaining ring and the retaining ring, and the outer end of the anti-hard particle ring is in contact with the cylinder wall.

[0006] The further improvement of the combined piston head structure with particle wear resistance of the utility model lies in that the cross-section of the support ring is L-shaped, and the end of the piston head main body away from the piston rod is adapted to the support ring.

[0007] The further improvement of the combined piston head structure with particle wear resistance of the utility model lies in that the second retaining ring, the retaining ring and the piston head main body are tightly connected by connecting bolts.

[0008] The further improvement of the combined piston head structure with particle wear resistance of the utility model lies in that the outer end of the anti-hard particle ring includes a lip, and the lip elevation angle is an obtuse angle.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The anti-hard particle ring arranged in the utility model is made of a hard material, and hard particles are not easily stuck on the ring, which can well block the particles. The Y-ring on the combined piston head can block water, thus forming a seal. This structure can not only protect the Y-ring from damage, but also protect the working cylinder, greatly extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of an existing piston head;

[0012] Figure 2 is a schematic structural diagram of the present utility model;

[0013] Figure 3 is a schematic structural diagram of the working state of the present utility model;

[0014] In the figure: 1 piston rod, 2 piston head body, 3 support ring, 4 retaining ring, 5 Y-ring, 6 second retaining ring, 7 anti-hard particle ring, 8 connecting bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0016] As Figure 2 , 3 shown, a combined piston head structure with particle wear resistance includes a piston head body 2 fixedly connected to a piston rod 1. A support ring 3 is provided at one end of the piston head body away from the piston rod. A retaining ring 4 is fixedly connected to one side surface of the piston head. A Y-ring 5 is provided between the retaining ring and the support ring. A second retaining ring 6 is connected to one side surface of the retaining ring away from the piston head body. An anti-hard particle ring 7 is provided between the second retaining ring and the retaining ring. The outer end of the anti-hard particle ring is in contact with the cylinder wall.

[0017] Furthermore, the cross section of the support ring is L-shaped, and one end of the piston head body away from the piston rod is adapted to the support ring. This improves the stability of the arrangement of the support ring and during the movement of the piston rod.

[0018] The second retaining ring, the retaining ring, and the piston head body are fixedly connected by a connecting bolt 8. The thickness of the second retaining ring is less than that of the retaining ring.

[0019] The outer end of the anti-hard particle ring includes a lip, and the lip angle of elevation is an obtuse angle. This better realizes preventing hard particles from entering the Y-ring.

[0020] The working principle of the present utility model is as follows: An anti-hard particle ring is installed on the second retaining ring. The lip angle of the anti-hard particle ring is relatively large and the material is relatively hard. Hard particles are not easily stuck on the ring, and it can effectively block the particles. This ring can prevent particles, but it does not play a sealing role and cannot prevent water. After the water passes through the anti-hard particle ring, the Y-ring on the combined piston head can block the water, thus forming a seal. This structure can not only protect the Y-ring from damage, but also protect the working cylinder. Through the comparison of the actual working conditions and usage time, the usage time of the existing combined piston head with material leakage is basically about 2 months, while the usage time of the CPI ring with the new combined piston head structure is about 6 months, which greatly extends the service life.

[0021] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A combined piston head structure with particle wear resistance, characterized in that: It includes a piston head body fixedly connected to the piston rod, a support ring is provided at one end of the piston head body away from the piston rod, a pressure ring is fixedly connected to one side of the piston head, a Y-shaped ring is provided between the pressure ring and the support ring, a second pressure ring is connected to the side of the pressure ring away from the piston head body, an anti-hard particle ring is provided between the second pressure ring and the pressure ring, and the outer end of the anti-hard particle ring is in contact with the cylinder wall.

2. A combined piston head structure with particle wear resistance according to claim 1, characterized in that: The support ring has an L-shaped cross section, and one end of the piston head body away from the piston rod is matched with the support ring.

3. A combined piston head structure with particle wear resistance according to claim 2, characterized in that: The second pressing ring, the pressing ring and the piston head body are fastened and connected by connecting bolts.

4. The combined piston head structure with particle wear resistance according to claim 3, characterized in that: The outer end of the anti-hard particle ring includes a lip, and the elevation angle of the lip is an obtuse angle.

Images