Sealing structure of new dustproof ring of column jack guide sleeve

Abstract

The utility model discloses a new sealing structure of guide sleeve dustproof ring of stand jack, to seal the guide sleeve of piston rod and piston cylinder, include: limit seat, set up in the piston cylinder, a plurality of sealing grooves, the guide sleeve is opened a plurality of evenly arranged sealing grooves in, and the sealing body for sealing the piston cylinder is equipped in sealing groove, sealing piece, to seal the guide sleeve with piston rod, prevent sealing piece and be extruded under high pressure and long -term and piston rod friction, including: set up in the guide sleeve and with the T -shaped sealing ring of piston rod adhesion and set up in the first balance groove of T -shaped sealing ring. The utility model, realize increase sealing piece, the contact area of sealing part and guide sleeve axial end face, optimize sealing piece, the lip contact pressure of sealing part realizes balance, prevent sealing piece, sealing part and be extruded under high pressure and long -term and piston rod friction, avoid sealing piece, sealing part when installing or under pressure edge curling or tearing.

Description

Technical Field

[0001] This utility model relates to the field of coal mining equipment technology, and in particular to a sealing structure of a novel dustproof ring for a column jack guide sleeve. Background Technology

[0002] Hydraulic supports are structures used to control the pressure in coal mining faces, thereby protecting the coal mining faces. Hydraulic supports have many components, the most important of which is the column. The main purpose of the column is to hinge with the top beam and the base to bear the increased resistance pressure brought by the roof plate and provide support force. It is the main support component of the hydraulic support.

[0003] Currently, the guide sleeve and dust seal are installed at the outer end of the cylinder body to guide the piston during extension and retraction. The guide sleeve bears the influence of external loads on the piston, such as lateral force, bending, and vibration. However, there are still some shortcomings. The common forms are mostly lip seals or labyrinth structures. If the dust seal is damaged, contaminants will enter, accelerating the failure and contamination of the sealing system, and even causing the column to jam and malfunction, seriously affecting the support performance of the support. When the dust seal groove of the guide sleeve is defective, the dust seal will be squeezed out and damaged during the long-term lifting and lowering process, thus losing its dustproof function. Coal dust, rock powder and other debris will seep into the interior and wear down the seal, causing the column to leak. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned shortcomings by providing a new sealing structure for the guide sleeve of a column jack, thereby increasing the contact area between the sealing element / seal part and the axial end face of the guide sleeve, optimizing the lip contact pressure of the sealing element / seal part to achieve balance, preventing the sealing element / seal part from being squeezed out under high pressure and long-term friction with the piston rod, and avoiding edge curling or tearing of the sealing element / seal part during installation or under pressure.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a sealing structure for a novel dustproof ring of a column jack guide sleeve, used to seal the guide sleeve between the piston rod and the piston cylinder, comprising: A limit seat, located inside the piston cylinder, is used to limit the installation of the guide sleeve; Multiple sealing grooves are provided in the guide sleeve, and each sealing groove is provided with a sealing body for sealing the piston cylinder. A seal, used to seal the guide sleeve and piston rod, preventing the seal from being squeezed out under high pressure and long-term friction with the piston rod, includes: A T-shaped sealing ring is set inside the guide sleeve and fits against the piston rod, and a first balance groove is set in the T-shaped sealing ring. A fixing groove adapted to the T-shaped sealing ring is opened on the guide sleeve. A sealing part, used to seal the guide sleeve and piston rod, increases the contact area between the sealing part and the end face of the guide sleeve, and optimizes the pressure of the contact between the sealing part and the piston rod to achieve balance, including: An M-shaped sealing ring is set inside the guide sleeve and fits against the piston rod, a fitting sealing ring is symmetrically set on the M-shaped sealing ring, and a second balance groove is set on the fitting sealing ring. A limiting component is located inside the sealing part and is used to install the sealing part and the guide sleeve.

[0006] Furthermore, the sealing body includes alternating and uniformly arranged first sealing rings and second sealing rings, the second sealing rings extending into the piston cylinder, and the piston cylinder having a first mounting groove adapted to the second sealing rings.

[0007] Furthermore, the T-shaped sealing ring has a transition fillet, the longitudinal section of the T-shaped sealing ring is annular, and the cross-section of the T-shaped sealing ring is T-shaped.

[0008] Furthermore, the guide sleeve has a second mounting groove that is compatible with the M-shaped sealing ring and the fitting sealing ring.

[0009] Furthermore, both the M-shaped sealing ring and the fitting sealing ring are provided with transition rounded corners.

[0010] Furthermore, the limiting member includes a mounting ring symmetrically arranged inside the M-shaped sealing ring and in contact with the piston rod, a connector disposed on the mounting ring, and a stud disposed on the connector for extending into the mounting ring.

[0011] The beneficial effects of this utility model are reflected in: This invention utilizes a guide sleeve mounted on a limiting seat within the piston cylinder. A first and second sealing ring are alternately installed within a sealing groove to seal the piston cylinder and guide sleeve. The guide sleeve is bolted to the piston cylinder. An M-shaped sealing ring and a fitting sealing ring are then installed inside the guide sleeve, secured by a mounting ring and connector on the limiting member via studs. The M-shaped and fitting sealing rings seal the piston rod. T-shaped sealing rings are alternately distributed with the M-shaped sealing rings. The rounded transition corners on the M-shaped, fitting, and T-shaped sealing rings prevent edge curling or tearing during installation or under pressure. The first and second balance grooves on the fitting and T-shaped sealing rings ensure a tight seal with the guide sleeve. The M-shaped and T-shaped sealing rings increase the contact area with the axial end face of the guide sleeve, optimizing the pressure of the lips of the fitting and T-shaped sealing rings to achieve balance, reduce local stress concentration, and prevent extrusion under high pressure and long-term friction with the piston rod. The pressure-distributing design reduces the risk of single-point extrusion. Attached Figure Description

[0012] Figure 1This is a longitudinal cross-sectional front view of the present invention; Figure 2 For the present utility model Figure 1 A magnified view of the portion shown in section A; Figure 3 For the present utility model Figure 1 A magnified view of the portion shown in section B; Figure 4 This is a three-dimensional structural view of the sealing part of this utility model; Figure 5 This is a three-dimensional structural view of the sealing element of this utility model.

[0013] In the picture: 1. Sealing groove; 2. Sealing body; 21. First sealing ring; 22. Second sealing ring; 3. Sealing element; 31. T-shaped sealing ring; 32. First balancing groove; 4. Sealing part; 41. M-shaped sealing ring; 42. Fitting sealing ring; 43. Second balance groove; 5. Limiting component; 51. Mounting ring; 52. Connecting component; 53. Stud; 6. Guide sleeve; 7. Limiting seat. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0015] Please see Figure 1-5 This utility model discloses a sealing structure for a novel dustproof ring on a column jack guide sleeve, used to seal the guide sleeve 6 between the piston rod and the piston cylinder, comprising: The limiting seat 7 is set inside the piston cylinder to limit the installation of the guide sleeve 6. The guide sleeve 6 and the end of the piston cylinder are fixedly installed by bolts. The longitudinal section of the limiting seat 7 is inverted T-shaped to seal the guide sleeve 6 and the piston cylinder. Multiple sealing grooves 1 are provided in the guide sleeve 6. Multiple sealing grooves 1 are evenly arranged, and each sealing groove 1 is provided with a sealing body 2 for sealing the piston cylinder. The sealing body 2 is a rubber sealing body, and the sealing groove 1 is used to install the sealing body 2. Seal 3 is used to seal the guide sleeve 6 and the piston rod, preventing the seal 3 from being squeezed out under high pressure and long-term friction with the piston rod. There are multiple seals 3, including: A T-shaped sealing ring 31 is disposed inside the guide sleeve 6 and fits against the piston rod, and a first balancing groove 32 is disposed on the T-shaped sealing ring 31. A fixing groove adapted to the T-shaped sealing ring 31 is opened on the guide sleeve 6. The first balancing groove 32 fits against the guide sleeve 6, and the fixing groove is in the shape of a T-shaped ring. The guide sleeve 6 is installed with the piston rod through the T-shaped sealing ring 31, which improves the sealing effect between the guide sleeve 6 and the piston rod and prevents the T-shaped sealing ring 31 from flipping and being squeezed out. Sealing part 4, used to seal the guide sleeve 6 and the piston rod, increases the contact area between the sealing part 4 and the end face of the guide sleeve 6, and optimizes the pressure of the sealing part 4 in contact with the piston rod to achieve balance. There are multiple sealing parts 4, which are alternately distributed with sealing elements 3, including: An M-shaped sealing ring 41 is set inside the guide sleeve 6 and fits against the piston rod, a fitting sealing ring 42 is symmetrically arranged on the M-shaped sealing ring 41, and a second balance groove 43 is set on the fitting sealing ring 42. The M-shaped sealing ring 41 and the fitting sealing ring 42 are integrally formed. Both the M-shaped sealing ring 41 and the fitting sealing ring 42 are rubber sealing rings, which prevents the sealing part 4 from flipping and being squeezed out, thus improving the service life. The limiting member 5 is disposed inside the sealing part 4 and is used to install the sealing part 4 and the guide sleeve 6. The limiting member 5 is used to install the sealing part 4 on the guide sleeve 6.

[0016] In use, the sealing body 2 is installed in the sealing groove 1 on the guide sleeve 6, and then the guide sleeve 6 drives the sealing body 2 to be installed on the limiting seat 7 on the piston cylinder. The piston cylinder and the guide sleeve 6 are installed with bolts. Then, the sealing element 3 and the sealing part 4 are installed on the inside of the guide sleeve 6. The M-shaped sealing ring 41 and the fitting sealing ring 42 on the sealing part 4 are installed in the guide sleeve 6 and installed by the limiting element 5. Then, the second balance groove 43 on the M-shaped sealing ring 41 and the fitting sealing ring 42 prevents the sealing part 4 from flipping and being squeezed out, thus improving its service life. The fitting sealing ring 42, the M-shaped sealing ring 41 and the T-shaped sealing ring 31 seal the guide sleeve 6 and the piston rod, thus improving the sealing effect.

[0017] In a specific embodiment, the sealing body 2 includes a first sealing ring 21 and a second sealing ring 22 arranged alternately and evenly. The second sealing ring 22 extends into the piston cylinder, and a first mounting groove adapted to the second sealing ring 22 is provided on the piston cylinder. The first sealing ring 21 and the second sealing ring 22 are alternately installed in the sealing groove 1 to improve the sealing effect between the guide sleeve 6 and the piston cylinder.

[0018] In one embodiment, the T-shaped sealing ring 31 is provided with a transition rounded corner. The longitudinal section of the T-shaped sealing ring 31 is annular, and the cross section of the T-shaped sealing ring 31 is T-shaped. There are multiple T-shaped sealing rings 31. The transition rounded corner on the T-shaped sealing ring 31 prevents the edges from curling or tearing during installation or under pressure.

[0019] In a specific embodiment, a second mounting groove is provided in the guide sleeve 6 to fit the M-shaped sealing ring 41 and the fitting sealing ring 42. The second mounting groove in the guide sleeve 6 is used to install the M-shaped sealing ring 41 and the fitting sealing ring 42 for sealing between the guide sleeve 6 and the piston rod.

[0020] In one embodiment, both the M-shaped sealing ring 41 and the fitting sealing ring 42 are provided with transition rounded corners to prevent the edges from curling or tearing during installation or under pressure.

[0021] In a specific embodiment, the limiting member 5 includes a mounting ring 51 symmetrically arranged inside the M-shaped sealing ring 41 and in contact with the piston rod, a connector 52 disposed on the mounting ring 51, and a stud 53 disposed on the connector 52 for extending into the mounting ring 51. The connector 52 and the stud 53 are used to install the two mounting rings 51, and the mounting ring 51 is composed of multiple arc sections.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] Additionally, "multiple" refers to two or more.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing structure for a novel dustproof ring on a column jack guide sleeve, used to seal the guide sleeve (6) between the piston rod and the piston cylinder, characterized in that, include: The limiting seat (7) is located inside the piston cylinder and is used to limit the installation of the guide sleeve (6); Multiple sealing grooves (1), the guide sleeve (6) has multiple evenly arranged sealing grooves (1), and each sealing groove (1) is provided with a sealing body (2) for sealing the piston cylinder. Seal (3), used to seal the guide sleeve (6) and the piston rod, to prevent the seal (3) from being squeezed out under high pressure and long-term friction with the piston rod, includes: A T-shaped sealing ring (31) is set inside the guide sleeve (6) and fits against the piston rod, and a first balance groove (32) is set in the T-shaped sealing ring (31), and a fixing groove adapted to the T-shaped sealing ring (31) is opened on the guide sleeve (6). A sealing part (4) is used to seal the guide sleeve (6) and the piston rod, thereby increasing the contact area between the sealing part (4) and the end face of the guide sleeve (6) and optimizing the pressure of the sealing part (4) and the piston rod to achieve balance. This includes: An M-shaped sealing ring (41) is set inside the guide sleeve (6) and fits against the piston rod, a fitting sealing ring (42) is symmetrically set on the M-shaped sealing ring (41), and a second balance groove (43) is set on the fitting sealing ring (42). The limiting member (5) is provided inside the sealing part (4) for installing the sealing part (4) and the guide sleeve (6).

2. The sealing structure of the novel dustproof ring for a column jack guide sleeve according to claim 1, characterized in that: The sealing body (2) includes a first sealing ring (21) and a second sealing ring (22) arranged alternately and evenly. The second sealing ring (22) extends into the piston cylinder, and a first mounting groove adapted to the second sealing ring (22) is provided on the piston cylinder.

3. The sealing structure of the novel dustproof ring for a column jack guide sleeve according to claim 1, characterized in that: The T-shaped sealing ring (31) is provided with a transition rounded corner, the longitudinal section of the T-shaped sealing ring (31) is circular, and the cross section of the T-shaped sealing ring (31) is T-shaped.

4. The sealing structure of the novel dustproof ring for a column jack guide sleeve according to claim 1, characterized in that: The guide sleeve (6) has a second mounting groove that is compatible with the M-shaped sealing ring (41) and the fitting sealing ring (42).

5. The sealing structure of the novel dustproof ring for a column jack guide sleeve according to claim 1, characterized in that: Both the M-shaped sealing ring (41) and the fitting sealing ring (42) are provided with transition rounded corners.

6. The sealing structure of the novel dustproof ring for a column jack guide sleeve according to claim 1, characterized in that: The limiting member (5) includes a mounting ring (51) symmetrically arranged inside the M-shaped sealing ring (41) and in contact with the piston rod, a connector (52) arranged on the mounting ring (51), and a stud (53) arranged on the connector (52) for extending into the mounting ring (51).

Images