Boosting cylinder control system capable of returning oil by utilizing self-gravity
By designing a double-chamber structure with rod cavity and no rod cavity in the afterburning cylinder, using gravity return oil, the problems of high maintenance costs and difficult maintenance of existing afterburning cylinders are solved, and the effect of reducing equipment costs and improving production efficiency is achieved.
Patent Information
- Application Number
- CN202421325931.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The existing afterburner cylinders have high maintenance costs and are difficult to maintain. Especially in multi-mode vulcanization machines, the seals have a short service life and high cost, making maintenance work inconvenient.
The afterburner cylinder control system using its own gravity return oil is designed as a double-chamber structure with a rod cavity and a rod cavity without a rod cavity. The afterburner cylinder return is achieved by gravity, reducing the use of seals, and vertically installing the afterburner cylinder for maintenance.
It greatly reduces the cost of equipment and subsequent maintenance and replacement, simplifies the maintenance process, reduces the difficulty of maintenance, and improves the production efficiency and the service life of the piston rod.
Smart Images
Figure CN222717177U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of hydraulic cylinders, and more specifically, to a booster cylinder control system that utilizes its own gravity to return oil. Background Art
[0002] Tire vulcanization is a key process in tire production, and the quality of vulcanization greatly affects the performance of the tire. During the tire vulcanization process, the tire blank is placed in the middle of the mold of the hydraulic vulcanizer through the central mechanism, vulcanization capsule and shaping control mechanism. After the upper and lower molds are closed and before the mold cavity is filled with high-temperature and high-pressure media, the booster cylinder installed on the bottom of the lower mold provides an upward clamping force to the lower mold through telescopic pressure, so that the upper and lower molds fit tightly and always keep their positions unchanged under the high temperature and high pressure of vulcanization production. If the clamping force does not meet the specified standard and the upper and lower molds are not tightly fitted, the vulcanized tire will have more flash and poor quality.
[0003] In the prior art, during the boosting process of the boosting cylinder, both the upper and lower cavities of the boosting cylinder need to be filled with oil, and the piston rod is moved upward by the interaction of the upper and lower hydraulic oil bodies. If impurities such as moisture and dust enter the cavity, the hydraulic oil body will deteriorate. These impurities will directly contact the sealing ring on the piston rod, etc., which will cause problems such as piston corrosion and aging, and then cause the clamping force to fail to meet the specified standard. Therefore, in order to ensure the overall sealing of the device, seals are required on the upper and lower cylinders of the boosting cylinder to prevent the hydraulic oil body from overflowing.
[0004] At present, most of the vulcanizers on the market adopt a multi-boosting cylinder structure design. As the number of boosting cylinders increases, the total number of seals required also increases accordingly. Due to the high cost of a single set of seals and the short service life of seals, especially for multi-mode vulcanizers such as dual-mode and four-mode, the cost of subsequent maintenance and replacement of seals is too high, and the maintenance frequency is high, which affects the production efficiency of the vulcanizer. In addition, since the boosting cylinders are installed below the lower mold of the vulcanizer, when the seals of the upper chamber of the boosting cylinder have problems and need to be replaced or maintained, the outer space of the upper chamber of the boosting cylinder is small, and the maintenance work is inconvenient and difficult. Utility Model Content
[0005] In order to solve the above-mentioned existing problems, the technical solution adopted by the utility model is: to provide a booster cylinder control system that utilizes its own gravity to return oil, which solves the problems of high maintenance cost and high maintenance difficulty of the existing booster cylinder, including a booster cylinder, a hydraulic oil tank and a hydraulic valve group connected to the hydraulic oil tank; a piston rod is slidingly provided in the inner cavity of the booster cylinder, and the piston end of the piston rod divides the inner cavity space of the booster cylinder into a rod chamber and a rodless chamber from top to bottom, and the rodless chamber is connected to the hydraulic oil body part in the hydraulic oil tank through a pipeline; the rod chamber is connected to a ventilation pipe, and the ventilation pipe is connected to the air part in the hydraulic oil tank.
[0006] Preferably, the booster cylinder is vertically mounted to the bottom surface of the lower mold of the vulcanizer, and the top end of the piston rod is fixedly connected to the bottom surface of the lower mold.
[0007] Preferably, there are multiple boosting cylinders, which are evenly distributed on a circle with the center of the mold as the center.
[0008] Preferably, the booster cylinder is provided with a through hole in the vertical direction, the interior of the piston rod is hollow, and the piston rod is slidably sleeved on the through hole.
[0009] Preferably, the through hole is larger in size than the center mechanism of the vulcanizer.
[0010] Preferably, the hydraulic valve group is connected to a PLC control system via electric wires.
[0011] Preferably, a seal is connected to the bottom end of the rodless cavity, and a seal ring and a dust ring are connected to the piston rod.
[0012] The beneficial effects of the utility model are as follows: the booster cylinder adopts a dual-cavity structure design in which the rod cavity is not filled with oil and the rodless cavity is filled with oil, and gravity is used to realize the return stroke of the booster cylinder, saving seals, greatly reducing equipment costs and subsequent maintenance and replacement costs. The booster cylinder is vertically installed on the bottom surface of the lower mold of the vulcanizer, and the seal is set at the bottom end of the rodless cavity, which is convenient for maintenance and replacement, easy to operate, and has low maintenance difficulty. The rod cavity is connected with a vent pipe; when the booster cylinder is boosted, the rodless cavity is filled with oil, and the air in the rod cavity is discharged into the hydraulic oil tank along the vent pipe. The space in the rod cavity changes little, the numerical fluctuation is small during the boosting process, and the control is stable; the clamping force on the lower mold is uniform and stable, avoiding uneven force causing different stresses on the piston rod, and extending the service life of the piston rod; when the booster cylinder is de-energized, the rodless cavity is discharged, the force on the upper surface of the piston end of the piston rod increases, and the force is quickly de-energized under the action of gravity, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0014] Figure 1 It is a schematic diagram of the structure of the utility model in Example 1;
[0015] Figure 2 This is a schematic diagram of the position of the utility model on the vulcanizing machine in Example 1;
[0016] Figure 3 It is a schematic diagram of the structure of the utility model in Example 2.
[0017] Explanation of symbols in the figure: 1. Boosting cylinder; 101. Rod chamber; 102. Rodless chamber; 2. Hydraulic valve group; 3. Piston rod; 4. Ventilation pipe; 5. Pipeline; 6. Lower mold; 7. Through hole; 8. PLC control system. DETAILED DESCRIPTION
[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0019] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0020] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0021] Example 1
[0022] A booster cylinder control system that uses its own gravity to return oil provided in Example 1 of the present application is now described.
[0023] See also Figure 1 , is a schematic diagram of the structure of the utility model in Example 1, the booster cylinder control system that uses its own gravity to return oil includes a booster cylinder 1, a hydraulic oil tank and a hydraulic valve group 2 connected to the hydraulic oil tank. The inner cavity of the booster cylinder 1 is slidably provided with a piston rod 3, and the piston end of the piston rod 3 divides the inner cavity space of the booster cylinder 1 from top to bottom into a rod chamber 101 and a rodless chamber 102. The rodless chamber 102 is connected to the hydraulic oil body part in the hydraulic oil tank through a pipeline 5. According to the production conditions, the hydraulic oil tank injects oil or returns oil to the rodless chamber 102 to provide clamping force or release force to the lower mold 6; the rod chamber 101 is connected to a vent pipe 4, and the vent pipe 4 is connected to the air part in the hydraulic oil tank.
[0024] See also Figure 2 , is a schematic diagram of the position of the utility model on the vulcanizing machine, Figure 2The center A is the installation position of a booster cylinder 1. The booster cylinder 1 is vertically installed to the bottom surface of the lower mold 6 of the vulcanizer, and the top of the piston rod 3 is fixedly connected to the bottom surface of the lower mold 6, so that the piston rod 3 can be fully affected by the gravity of the lower mold 6, and the upward force of the piston rod 3 is fully converted into a clamping force, avoiding the waste and insufficient utilization of the force of the piston rod 3 in other directions.
[0025] Specifically, when in use, the staff opens the valve corresponding to the rod chamber 101 in the hydraulic valve group 2 to maintain air circulation, does not start the corresponding oil pump, and connects the ventilation pipe 4 to the air in the corresponding hydraulic oil tank to form a closed structure.
[0026] When the vulcanizer mold requires a clamping force, the hydraulic valve group 2 and the corresponding oil pump are started, and the hydraulic oil tank injects oil into the rodless chamber 102 through the pipeline 5. The air in the rod chamber 101 is discharged into the hydraulic oil tank along the vent pipe 4. The piston rod 3 moves upward in a short stroke under the action of the hydraulic oil body, and the top of the piston rod 3 applies an upward clamping force to the bottom surface of the lower mold 6 to meet the production process requirements during the vulcanization process. In this process, the space in the rod chamber 101 changes little, the numerical fluctuations during the force application process are small, and the control is stable. The gas volume, density, and gravity of the piston rod 3 in the rod chamber 101 in each boosting cylinder 1 are almost the same, and the resistance and hydraulic oil force of each boosting cylinder 1 are almost the same, and the clamping force provided is also almost the same, so that the clamping force on the lower mold 6 is uniform and stable, avoiding uneven force causing different stresses on different piston rods 3, and extending the service life of the piston rod 3.
[0027] When the vulcanizer mold needs to release force, the rodless cavity 102 returns oil to the corresponding hydraulic oil tank through the pipeline 5. At this time, the oil pressure resistance is small. Under the gravity of the piston rod 3 and the lower mold 6, the piston rod 3 moves down until the piston end of the piston rod 3 reaches the bottom of the rodless cavity 102. In this process, the air volume in the hydraulic oil tank becomes smaller, the space of the rod cavity 101 becomes larger, and the force on the upper surface of the piston end of the piston rod 3 increases, so that the piston end can completely drop to the required stroke, quickly complete the release of force, and improve production efficiency.
[0028] Furthermore, there are multiple boosting cylinders 1, which are evenly distributed on a circumference with the center of the following mold 6 as the center, to ensure that the clamping force provided by the boosting cylinders 1 is uniform.
[0029] Furthermore, the hydraulic valve group 2 is connected to the PLC control system 8 through electric wires. Under the control of the PLC control system 8, the hydraulic valve group 2 and the oil pump are started, and the hydraulic oil tank injects or returns oil to the rodless chamber 102 of the booster cylinder 1 through the pipeline 5. When the vulcanizer mold needs to release force, the PLC control system 8 controls the hydraulic valve group 2 to open the oil drain valve in advance to prevent the hydraulic oil body in the rodless chamber 102 from fluctuating during the release of force, causing the piston rod 3 to continue to move upward.
[0030] Specifically, a seal is connected to the bottom end of the rodless chamber 102, and a seal ring and a dust ring are connected to the piston rod 3. The hydraulic valve group 2 injects oil into the rodless chamber 102, and there is no need to inject oil into the rod chamber 101. Therefore, the rodless chamber 102 needs to be sealed by a seal to prevent the hydraulic oil from overflowing from the body. It only needs to be sealed by the seal ring and the dust ring on the piston rod 3 to prevent dust and impurities from entering the chamber. There is no need to use additional seals, which saves a set of seals and greatly reduces the equipment cost and the cost of subsequent maintenance and replacement. The booster cylinder 1 is vertically installed to the bottom surface of the lower mold 6 of the vulcanizer, and the seal is set at the bottom end of the rodless chamber 102. The outer space of the bottom end of the booster cylinder 1 is large, which is convenient for maintenance and replacement, easy to operate, and has low maintenance difficulty.
[0031] The booster cylinder 1 adopts a double-chamber structure with upper and lower chambers closed, which reduces the damage of dust, impurities, etc. to the piston rod 3 and prolongs the service life of the sealing ring, dust ring, etc. on the piston rod 3.
[0032] Example 2
[0033] A booster cylinder control system that uses its own gravity to return oil provided in Example 2 of the present application is now described.
[0034] See also Figure 3 , is a structural diagram of the utility model in Example 2. The booster cylinder control system that uses its own gravity to return oil in this embodiment is further optimized on the basis of Example 1. The difference from Example 1 is that the number of booster cylinders 1 is single, and the structures of the booster cylinder 1 and the piston rod 3 are different.
[0035] Furthermore, the booster cylinder 1 is provided with a through hole 7 in the vertical direction, the piston rod 3 is hollow inside, and the piston rod 3 is slidably sleeved on the through hole 7 .
[0036] Furthermore, the size of the through hole 7 is larger than the central mechanism of the vulcanizer. The through hole 7 is sleeved on the central mechanism of the vulcanizer, and the piston rod 3 slides along the through hole 7 and the inner wall of the booster cylinder 1. Based on Example 1, one booster cylinder 1 is used, and the clamping force on the lower mold 6 is more uniform and stable.
[0037] The working process of the utility model is as follows: when the vulcanizer mold needs a clamping force, the PLC control system 8 controls the hydraulic valve group 2 and the corresponding oil pump to start, and the hydraulic oil tank injects oil into the rodless cavity 102 through the pipeline 5, and the piston end of the piston rod 3 is lifted by the oil and slides up, exerting an upward clamping force on the lower mold 6 to meet the production process requirements during the vulcanization process; when the vulcanizer mold needs to release force, the PLC control system 8 controls the hydraulic valve group 2 to open the oil drain valve in advance, and the rodless cavity 102 returns oil to the hydraulic oil tank through the pipeline 5, and under the gravity of the piston rod 3 and the lower mold 6, the piston rod 3 moves downward to complete the force release.
[0038] In the utility model, the booster cylinder 1 adopts a dual-cavity structure design in which the rod cavity 101 is not filled with oil and the rodless cavity 102 is filled with oil, and gravity is used to realize the return stroke of the booster cylinder 1, saving seals, greatly reducing equipment costs and subsequent maintenance and replacement costs. The booster cylinder 1 is vertically installed on the bottom surface of the lower mold 6 of the vulcanizer, and the seal is arranged at the bottom end of the rodless cavity 102, which is convenient for maintenance and replacement, easy to operate, and has low maintenance difficulty. The rod chamber 101 is connected to the ventilation pipe 4; when the booster cylinder 1 applies force, the rodless chamber 102 is filled with oil, and the air in the rod chamber 101 is discharged into the hydraulic oil tank along the ventilation pipe 4. The space in the rod chamber 101 changes little, the numerical fluctuation is small during the force application process, and the control is stable; the clamping force applied to the lower mold 6 is uniform and stable, avoiding uneven force that causes different stresses on different piston rods 3, thereby extending the service life of the piston rod 3; when the booster cylinder 1 releases force, the rodless chamber 102 discharges oil, the force on the upper surface of the piston end of the piston rod 3 increases, and the force is released quickly under the action of gravity, thereby improving production efficiency.
[0039] The above-mentioned specific implementation methods do not cover the entire protection scope of the utility model. Modifications or equivalent replacements of the utility model should all fall within the patent coverage requirements of the utility model. In the utility model, the above-mentioned embodiments are only used to illustrate the technical solution of the present application, rather than to limit it; although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above-mentioned embodiments, or replace some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. A booster cylinder control system utilizing its own gravity to return oil, comprising a booster cylinder (1), a hydraulic oil tank and a hydraulic valve group (2) connected to the hydraulic oil tank; characterized in that: The inner cavity of the booster cylinder (1) is slidably provided with a piston rod (3), and the piston end of the piston rod (3) divides the inner cavity space of the booster cylinder (1) into a rod chamber (101) and a rodless chamber (102) from top to bottom, and the rodless chamber (102) is connected to the hydraulic oil body part in the hydraulic oil tank through a pipeline (5); the rod chamber (101) is connected to a ventilation pipe (4), and the ventilation pipe (4) is connected to the air part in the hydraulic oil tank.
2. A booster cylinder control system utilizing its own gravity to return oil as claimed in claim 1, characterized in that: The booster cylinder (1) is vertically mounted on the bottom surface of a lower mold (6) of a vulcanizer, and the top end of the piston rod (3) is fixedly connected to the bottom surface of the lower mold (6).
3. A booster cylinder control system utilizing its own gravity to return oil as claimed in claim 2, characterized in that: There are a plurality of booster cylinders (1), and the booster cylinders (1) are evenly distributed on a circumference with the center of the lower mold (6) as the center.
4. A booster cylinder control system utilizing its own gravity to return oil as claimed in claim 2, characterized in that: The booster cylinder (1) is provided with a through hole (7) in the vertical direction, the piston rod (3) is hollow inside, and the piston rod (3) is slidably sleeved on the through hole (7).
5. A booster cylinder control system utilizing its own gravity to return oil as claimed in claim 4, characterized in that: The through hole (7) is larger than the central mechanism of the vulcanizer.
6. A booster cylinder control system utilizing its own gravity to return oil as claimed in any one of claims 1 to 5, characterized in that: The hydraulic valve group (2) is connected to a PLC control system (8) via electric wires.
7. A booster cylinder control system utilizing its own gravity to return oil as claimed in claim 1, characterized in that: The bottom end of the rodless chamber (102) is connected to a sealing member, and the piston rod (3) is connected to a sealing ring and a dust ring.