Efficient sealing assembly for thrust cylinder of shield tunneling machine

Abstract

The utility model discloses an efficient sealing assembly of a shield tunneling machine thrust oil cylinder, and relates to the technical field of shield tunneling machine thrust oil cylinders, the efficient sealing assembly comprises a cylinder body, the cylinder body comprises a top cover and a piston rod, the piston rod is installed in the middle of the top cover in a sliding mode, and two positioning seats are symmetrically installed on the top face of the top cover. A sealing assembly body is detachably installed in the two positioning seats, installation and limiting of the sealing assembly body are completed through the two positioning seats installed on the top face of the top cover, and the two sealing sleeves are arranged on the surface of the piston rod in a sleeving mode. The annular brush and the sealing ring which are installed through the first groove body and the second groove body are arranged on the surface of the piston rod in a sleeving mode, tightly attached to the surface of the piston rod and matched with the piston rod to work, meanwhile, dust attached to the surface of the piston rod is cleaned through the annular brush, and under cooperation of the sealing ring, the dust is prevented from entering the cylinder body to be mixed with hydraulic oil; and the normal work of the thrust cylinder is influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to shield machine propulsion oil cylinder technical field, concretely is a kind of shield machine propulsion oil cylinder high-efficiency sealing assembly. BACKGROUND

[0002] Shield machine is a special engineering machinery of tunneling, modern shield tunneling machine sets light, machine, electricity, liquid, sensing, information technology in one, with excavating cutting soil, conveying earth, assembling tunnel lining, measuring and guiding rectification etc., involves geology, civil engineering, machinery, mechanics, hydraulic pressure, electrical, control, measurement etc., the forward power required by shield machine when working is provided by propulsion oil cylinder.

[0003] However, the existing shield machine propulsion oil cylinder is used only by the sealing assembly installed in the top of cylinder body cooperates piston rod, sealing and protection effect is poor, some dust is easily attached to the surface of piston rod, follow piston rod into the inside of oil cylinder cylinder body, mix with hydraulic oil, affect the normal work of propulsion oil cylinder. UTILITY MODEL CONTENTS

[0004] In order to solve the existing shield machine propulsion oil cylinder piston rod only by the sealing assembly installed in the top of cylinder body cooperates piston rod, sealing and protection effect is poor, affect the normal work of propulsion oil cylinder problem;The purpose of the utility model is to provide a kind of shield machine propulsion oil cylinder high-efficiency sealing assembly.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: a kind of shield machine propulsion oil cylinder high-efficiency sealing assembly, including cylinder body, the cylinder body includes top cover and piston rod, the piston rod is slidably installed in the middle of top cover, the top surface of top cover is symmetrically installed with locating seat, the number of locating seat is two, two the sealing assembly body of detachable installation is installed in the locating seat, the sealing assembly body includes sealing sleeve, the number of sealing sleeve is two, the two sides of two sealing sleeves are fixedly installed with guide strip, the side of two locating seats is symmetrically provided with locating groove, the guide strip is slidably installed in locating groove, two sealing sleeves are relatively slid by guide strip between two locating seats;

[0006] The side of two sealing sleeves is provided with first groove body, annular brush is slidably clamped in the first groove body, the lower side of two sealing sleeves is provided with second groove body, sealing ring is clamped in the second groove body, the annular brush and sealing ring are mutually matched with piston rod, two locating pieces are installed between two locating seats and on the two sides of two sealing sleeves, the number of locating piece is two, the two sides of two locating pieces are fixedly installed with locating strip, the locating strip is slidably clamped in locating groove, two locating pieces are relatively slid by locating strip on the two sides of two sealing sleeves.

[0007] Preferably, positioning components are installed on both sides of the two positioning seats. Each positioning component includes a guide seat, a positioning pin is fixedly installed on one side of the guide seat, and a return spring is symmetrically installed on the side of the guide seat away from the positioning pin. The positioning pin is slidably inserted into the positioning strip through the guide seat and the return spring.

[0008] Preferably, a push-pull component is fixedly installed on one side of the guide seat, and the push-pull component is slidably installed on one side surface of the positioning seat, and the push-pull component cooperates with the guide seat.

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

[0010] 1. In this utility model, the installation and positioning of the sealing component body is completed by two positioning seats installed on the top surface of the top cover, so that the two sealing sleeves are fitted on the surface of the piston rod. After the two sealing sleeves are fitted on the surface of the piston rod, the annular brush and sealing ring installed by the first groove and the second groove are fitted on the surface of the piston rod, which are in close contact with the surface of the piston rod and work together with the piston rod. At the same time, the annular brush cleans the dust attached to the surface of the piston rod, and with the cooperation of the sealing ring, it prevents the dust from entering the cylinder and mixing with the hydraulic oil, thus affecting the normal operation of the propulsion cylinder.

[0011] 2. In this utility model, two positioning components installed on the same side of the two positioning seats cooperate with the corresponding positioning strip to complete the installation and fixation of a positioning component between the two positioning seats, thereby completing the installation and fixation of the sealing component body between the two positioning seats. With the cooperation of the two positioning components and the corresponding positioning components, it is convenient to disassemble and assemble the sealing component body, and replace the annular brush and sealing ring of the sealing component body. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the top cover and positioning seat structure of this utility model.

[0015] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0016] Figure 4 This is an exploded view of the top surface structure of the top cover of this utility model.

[0017] Figure 5 This is a schematic diagram of the internal structure of the sealing component of this utility model.

[0018] In the diagram: 1. Cylinder body; 11. Top cover; 12. Piston rod; 2. Positioning seat; 21. Positioning groove; 3. Sealing assembly body; 31. Sealing sleeve; 311. Guide strip; 312. Handle groove; 32. First groove; 33. Annular brush; 34. Second groove; 35. Sealing ring; 4. Positioning component; 41. Positioning strip; 411. Positioning hole; 42. Pull groove; 5. Positioning assembly; 51. Guide seat; 52. Positioning pin; 53. Return spring; 54. Push-pull component. Detailed Implementation

[0019] 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 some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: Figures 1-5 As shown, this utility model provides a high-efficiency sealing component for a tunnel boring machine propulsion cylinder, including a cylinder body 1. The cylinder body 1 includes a top cover 11 and a piston rod 12. The piston rod 12 is slidably installed in the middle of the top cover 11. Two positioning seats 2 are symmetrically installed on the top surface of the top cover 11. A sealing component body 3 is detachably installed in each of the two positioning seats 2. The sealing component body 3 includes two sealing sleeves 31. Guide strips 311 are fixedly installed on both sides of each of the two sealing sleeves 31. Positioning grooves 21 are symmetrically opened on one side of each of the two positioning seats 2. The guide strips 311 are slidably installed in the positioning grooves 21. The two sealing sleeves 31 slide relative to each other through the guide strips 311. Between the two positioning seats 2, a first groove 32 is provided on one side of each of the two sealing sleeves 31. An annular brush 33 is slidably engaged in the first groove 32. A second groove 34 is provided below each of the two sealing sleeves 31 located in the first groove 32. A sealing ring 35 is engaged in the second groove 34. The annular brush 33 and the sealing ring 35 are both engaged with the piston rod 12. Positioning elements 4 are installed between the two positioning seats 2 and on both sides of the two sealing sleeves 31. There are two positioning elements 4. Positioning strips 41 are fixedly installed on both sides of the two positioning elements 4. The positioning strips 41 are slidably engaged in the positioning groove 21. The two positioning elements 4 slide relative to each other on both sides of the two sealing sleeves 31 through the positioning strips 41.

[0021] The installation of the sealing assembly body 3 is limited by the two positioning seats 2 installed on the top surface of the top cover 11. The sealing assembly body 3 is composed of two sealing sleeves 31. The installation and positioning of the two sealing sleeves 31 between the two positioning seats 2 are completed through the cooperation of the guide strips 311 installed on the two sides of the two sealing sleeves 31 and the corresponding positioning grooves 21, so that the two sealing sleeves 31 are sleeved on the surface of the piston rod 12 and cooperate with the piston rod 12 to work. After the two sealing sleeves 31 are sleeved on the surface of the piston rod 12, the annular brush 33 and the sealing ring 35 installed through the first groove body 32 and the second groove body 34 are also sleeved on the surface of the piston rod 12 and tightly fit the surface of the piston rod 12, cooperating with the piston rod 12 to work. The dust attached to the surface of the piston rod 12 is cleaned by the annular brush 33, and the dust is prevented from entering the cylinder 1 under the cooperation of the sealing ring 35.

[0022] The two positioning seats 2 are symmetrically installed with positioning assemblies 5 on the two sides. The positioning assembly 5 includes a guide seat 51. A positioning pin 52 is fixedly installed on one side of the guide seat 51. A return spring 53 is symmetrically installed on the side of the guide seat 51 away from the positioning pin 52. The positioning pin 52 is slidingly inserted into the positioning strip 41 through the guide seat 51 and the return spring 53. After the corresponding positioning piece 4 is installed in the two positioning seats 2 through the positioning strip 41, the positioning pin 52 is controlled to be inserted into the positioning hole 411 opened at one end of the corresponding positioning strip 41 through the cooperation of the guide seat 51 and the return spring 53 in the positioning assembly 5. The installation and fixation of one positioning piece 4 between the two positioning seats 2 are completed through the cooperation of the two positioning assemblies 5 installed on the same side of the two positioning seats 2 and the corresponding positioning strip 41, thereby completing the installation and fixation of the sealing assembly body 3 between the two positioning seats 2.

[0023] A push-pull piece 54 is fixedly installed on one side of the guide seat 51. The push-pull piece 54 is slidingly installed on one side surface of the positioning seat 2. The push-pull piece 54 cooperates with the guide seat 51 to control the guide seat 51 to drive the corresponding positioning pin 52 to be pulled out or inserted into the positioning hole 411. The positioning hole 411 is opened at one end of the positioning strip 41. The positioning pin 52 is slidingly inserted into the positioning hole 411. The insertion and positioning of the corresponding positioning pin 52 are completed through the positioning hole 411 opened at one end of the positioning strip 41.

[0024] One side of each of the two sealing sleeves 31 is provided with a handle groove 312. The handle groove 312 cooperates with the sealing sleeve 31. The two sealing sleeves 31 are disassembled between the two positioning seats 2 through the handle grooves 312 respectively opened on one side of each of the two sealing sleeves 31. A pull groove 42 is opened in the middle of one side of the top surface of the positioning piece 4. The pull groove 42 cooperates with the positioning piece 4. The two positioning pieces 4 are disassembled between the two positioning seats 2 through the pull grooves 42 respectively opened in the middle of one side of the top surface of each of the two positioning pieces 4.

[0025] Working principle: the installation of the two positioning seats 2 on the top surface of the top cover 11 completes the installation limiting of the sealing assembly body 3, the sealing assembly body 3 is composed of two sealing sleeves 31, under the cooperation of the guide strips 311 installed on the two sides of the two sealing sleeves 31 and the corresponding positioning grooves 21, the installation and positioning of the two sealing sleeves 31 between the two positioning seats 2 is completed, so that the two sealing sleeves 31 are sleeved on the surface of the piston rod 12, after the sleeving is completed, the corresponding positioning piece 4 is installed in the two positioning seats 2 through the positioning strip 41, under the cooperation of the guide seat 51 and the reset spring 53 in the positioning assembly 5, the positioning bolt 52 is inserted into the positioning hole 411 opened on the one side end of the corresponding positioning strip 41, the installation and fixation of one positioning piece 4 between the two positioning seats 2 is completed through the cooperation of the two positioning assemblies 5 installed in the same side of the two positioning seats 2 and the corresponding positioning strip 41, so that the installation and fixation of the sealing assembly body 3 between the two positioning seats 2 is completed.

[0026] When the sealing assembly body 3 is fixed, the two sealing sleeves 31 are sleeved on the surface of the piston rod 12, and cooperate with the piston rod 12 to work, when the two sealing sleeves 31 are sleeved on the surface of the piston rod 12, the annular brush 33 and the sealing ring 35 installed through the first groove body 32 and the second groove body 34 are all sleeved on the surface of the piston rod 12, and cooperate with the piston rod 12 to work, the dust attached to the surface of the piston rod 12 is cleaned through the annular brush 33, and the dust is prevented from entering the cylinder body 1 through the sealing ring 35.

[0027] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Therefore, if these modifications and variations of the utility model belong to the scope of the utility model claims and equivalent technologies, the utility model also intends to include these modifications and variations.

Claims

1. A high-efficiency sealing assembly for a shield machine propulsion cylinder, comprising a cylinder body (1), characterized in that: The cylinder (1) includes a top cover (11) and a piston rod (12) slidingly installed in the middle of the top cover (11), the top surface of the top cover (11) is symmetrically provided with two positioning seats (2), two sealing assembly bodies (3) are detachably installed in the two positioning seats (2), the sealing assembly body (3) includes two sealing sleeves (31), the two sealing sleeves (31) are fixedly installed on the two sides of the two sealing sleeves (31), one side of each of the two positioning seats (2) is symmetrically provided with a positioning groove (21), the guiding strip (311) is slidingly installed in the positioning groove (21), and the two sealing sleeves (31) slide relative to each other through the guiding strip (311) between the two positioning seats (2). One side of each of the two sealing sleeves (31) is provided with a first groove body (32), an annular brush (33) is slidingly clamped in the first groove body (32), a second groove body (34) is formed below the first groove body (32) of each of the two sealing sleeves (31), and a sealing ring (35) is clamped in the second groove body (34). The annular brush (33) and the sealing ring (35) are matched with the piston rod (12), positioning pieces (4) are installed between the two positioning seats (2) and on the two sides of the two sealing sleeves (31), the number of the positioning pieces (4) is two, positioning strips (41) are fixedly installed on the two sides of the two positioning pieces (4), the positioning strips (41) are slidingly clamped in the positioning grooves (21), and the two positioning pieces (4) slide relative to each other through the positioning strips (41) on the two sides of the two sealing sleeves (31).

2. The high-efficiency sealing assembly of the thrust cylinder of the tunneling machine according to claim 1, characterized in that, Positioning assemblies (5) are installed in the two positioning seats (2), the positioning assembly (5) includes a guiding seat (51), a positioning bolt (52) is fixedly installed on one side of the guiding seat (51), a return spring (53) is symmetrically installed on the side, away from the positioning bolt (52), of the guiding seat (51), and the positioning bolt (52) is slidingly inserted into the positioning strip (41) through the guiding seat (51) and the return spring (53).

3. The high efficiency seal assembly for a shield machine thrust ram as defined in claim 2 wherein, A push-pull piece (54) is fixedly installed on one side of the guiding seat (51), the push-pull piece (54) is slidingly installed on one side surface of the positioning seat (2), and the push-pull piece (54) is matched with the guiding seat (51).

4. The high efficiency seal assembly for a shield machine thrust ram as defined in Claim 2 wherein, A positioning hole (411) is formed in one side end of the positioning strip (41), and the positioning bolt (52) is slidingly inserted into the positioning hole (411).

5. The high efficiency seal assembly for a shield machine thrust ram as defined in claim 1 wherein, A handle groove (312) is formed in one side of each of the two sealing sleeves (31), and the handle groove (312) is matched with the sealing sleeve (31).

6. The high efficiency seal assembly for a shield machine thrust ram as defined in Claim 1 wherein, A pulling groove (42) is formed in one side of the top surface of the positioning piece (4), and the pulling groove (42) is matched with the positioning piece (4).

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