A hydraulic cylinder sealing device for vulcanizing machine to produce rubber

Abstract

The present invention relates to the technical field of hydraulic cylinders, and in particular to a hydraulic cylinder sealing device for producing rubber in a vulcanizing machine, comprising: a cylinder barrel; a rear sealing component, the inner side of the rear sealing component is threadedly connected to the outer side of the cylinder barrel; a front sealing component, the inner side of the front sealing component is threadedly connected to a side of the cylinder barrel away from the rear sealing component; a piston rod, the outer wall of the piston rod is slidably connected to the inner side of the front sealing component; a piston component, the outer side of the piston component is slidably connected to the inner wall of the cylinder barrel. The present invention provides a rear sealing component, and when the piston rod lifts a heavy object, if the oil inlet pipeline is ruptured or pressure is lost, the object acting on the outer side of the piston rod will move downward instantly under the action of gravity, and the baffle block will contact the baffle ring under the thrust of the hydraulic oil. At this time, the hydraulic oil cannot flow through the gap between the baffle block and the baffle ring, so the heavy object can be prevented from falling downward when the oil inlet pipeline is ruptured or pressure is lost.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinders, and in particular to a hydraulic cylinder sealing device used for vulcanizing machines to produce rubber. Background Art

[0002] The production of rubber by vulcanizing machine is a process of vulcanizing rubber by using vulcanizing machine. The high temperature, high pressure and specific time provided by the vulcanizing machine cause the rubber molecules to undergo cross-linking reaction, thereby improving the properties of the rubber, such as strength, elasticity, wear resistance, etc. In the process of producing rubber by vulcanizing machine, the sealing performance of the hydraulic cylinder is crucial to the normal operation of the equipment and product quality.

[0003] In the prior art, the existing hydraulic cylinder sealing devices often have unsatisfactory sealing effects and are prone to leakage during use. If the oil inlet pipeline suddenly bursts or loses pressure when the piston rod is extended, the object of the piston rod will lose pressure instantly and fall, which may affect the quality of the rubber product. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention solves the technical problems by adopting the following technical solutions: a hydraulic cylinder sealing device for producing rubber in a vulcanizing machine, comprising: a cylinder barrel; a rear sealing component, the inner side of which is threadedly connected to the outer side of the cylinder barrel; a front sealing component, the inner side of which is threadedly connected to a side of the cylinder barrel away from the rear sealing component; a piston rod, the outer wall of which is slidably connected to the inner side of the front sealing component; a piston component, the outer side of which is slidably connected to the inner wall of the cylinder barrel, the piston component is placed inside the cylinder barrel, then fixed to the piston rod, and then the front sealing component is fixed to the cylinder barrel through the piston rod, and finally the rear sealing component is fixed to the cylinder barrel, thereby completing the assembly of the device, and then the device is connected to an oil tank with a reversing valve, at which time the device can work normally;

[0005] The rear sealing component comprises a rear sealing cover, the top of the rear sealing cover is fixedly connected with a rear oil guide pipe, the bottom of the rear oil guide pipe is provided with an inner cylinder, the inner side of the inner cylinder is fixedly connected with an annular porous plate, the inner side of the inner cylinder is fixedly connected with a flow blocking ring, the center of the inner side of the rear sealing cover is fixedly connected with a nitrogen spring, the end of the nitrogen spring away from the rear sealing cover is fixedly connected with a flow blocking block, the outer side of the flow blocking block is provided with an elastic sealing member, when the piston rod lifts the heavy object, if the oil inlet pipeline is broken Or loss of pressure will cause the object acting on the outside of the piston rod to move downward instantly under the action of gravity, and make the baffle block contact with the baffle ring under the thrust of the hydraulic oil. At this time, the nitrogen spring is compressed, and the hydraulic oil cannot flow through the gap between the baffle block and the baffle ring. When the piston rod retracts into the cylinder, under the elastic force of the nitrogen spring, the hydraulic oil on the other side of the cylinder can flow through the gap between the baffle block and the baffle ring, and finally return to the oil tank through the rear oil guide pipe.

[0006] Preferably, the outer side of the inner tube is fixedly connected to the inner side of the rear cover, the inner side of the rear cover is threadedly connected to the outer side of the cylinder, the inner side of the cylinder is slidingly connected to the outer side of the inner tube, there are two elastic sealing members, which are respectively fixedly connected to the inner sides of the rear cover and the front sealing member, and when oil is injected into the rear oil guide pipe, the hydraulic oil can enter the inner side of the inner tube through the rear cover, and then flow out from the annular porous plate after passing through the baffle ring and the baffle block, and enter the inner side of the cylinder.

[0007] Preferably, the outer side of the elastic seal contacts the outer side of the cylinder, the outer side of the baffle ring contacts the outer side of the baffle block, and the outer side of the baffle block contacts the outer side of the annular porous plate. In the process of fixing the front sealing component and the rear sealing component to the cylinder, the elastic seals located on the inner sides of the front sealing component and the rear sealing component are squeezed and deformed by the two ends of the cylinder. At this time, the elastic wave plate located on the inner side of the elastic seal is squeezed and deformed. Therefore, under the elastic force of the elastic wave plate, the outer sides of the two elastic seals can be tightly attached to the two ends of the cylinder, thereby preventing the hydraulic oil from leaking from the interfaces on both sides of the cylinder.

[0008] Preferably, the front sealing component includes a front sealing cover, the top of the front sealing cover is fixedly connected to a front oil guide pipe, the outer side of the front sealing cover is fixedly connected to a sealing shell by bolts, the inner wall of the front sealing cover is clamped with a sealing ring, the inner wall of the front sealing cover is fixedly connected to the outer side of the elastic sealing component, and the hydraulic oil enters from the front oil guide pipe. At this time, the hydraulic oil enters into the cylinder through the front sealing cover. At this time, as the hydraulic oil in the chamber on the side of the cylinder close to the front sealing component gradually increases, the piston component can slide in the cylinder and drive the piston rod to retract into the cylinder during the sliding process.

[0009] Preferably, the inner side of the front cover is threadedly connected to the outer side of the cylinder, the center of the front cover is slidably connected to the outer wall of the piston rod, the outer wall of the piston rod is slidably connected to the inner side of the sealing ring, and the inner side of the sealing shell is slidably connected to the outer wall of the piston rod. During the sliding process of the piston rod, the sealing ring can seal the front cover to prevent the piston rod from bringing out the hydraulic oil during operation.

[0010] Preferably, a tension spring is fixedly connected to the inner wall of the encapsulation shell, an annular plate is fixedly connected to the end of the tension spring away from the encapsulation shell, an elastic scraper is fixedly connected to the inner wall of the encapsulation shell, a compression spring is fixedly connected to the outer wall of the elastic scraper, and a dust isolation ring is fixedly connected to the outer side of the encapsulation shell; when the piston rod extends out of the cylinder, the annular plate and the piston rod slide relative to each other, thereby scraping off the oil attached to the surface of the piston rod.

[0011] Preferably, the inner side of the annular plate is slidably connected to the outer wall of the piston rod, the outer wall of the piston rod is slidably connected to the inner side of the elastic scraper, the inner side of the dust shielding ring is slidably connected to the outer wall of the piston rod, the end of the compression spring away from the elastic scraper is fixedly connected to the inner wall of the packaging shell, the elastic scraper can perform secondary cleaning on the surface of the piston rod, the compression spring always presses the elastic scraper so that the inner side of the elastic scraper is always in contact with the piston rod.

[0012] Preferably, the piston component includes a connecting rod, both ends of the connecting rod are fixedly connected with side blocks, the outer wall of the connecting rod is symmetrically slidably connected with a baffle, the outer side of the baffle is clamped with a sealing ring, the outer wall of the baffle is fixedly connected with a rubber sleeve, the outer side of the rubber sleeve is clamped with a rubber ring, the inner wall of the baffle is fixedly connected with an elastic top plate, the inner side of the rubber sleeve is fixedly connected with a support ring, the hydraulic oil pushes the baffle on one side to slide along the surface of the connecting rod, at this time the elastic top plate is deformed by force, and expands outward under the limiting action of the clamping ring, and pushes the rubber sleeve outward, at this time the rubber ring can fit tightly with the inner wall of the cylinder under the extrusion of the rubber sleeve.

[0013] Preferably, the outer side of the elastic top plate is clamped with the inner side of the rubber ring through a clamping ring, and the outer side of the clamping ring is fixedly connected to the inner side of the rubber ring, the outer sides of the sealing ring and the rubber ring are both slidably connected to the inner wall of the cylinder, the support ring is linearly arranged along the central axis of the rubber sleeve, the side block limits the sliding stroke of the baffle, and the support ring can support the rubber sleeve to prevent the rubber sleeve from expanding inward when squeezed.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The present invention provides elastic seals. In the process of fixing the front sealing component and the rear sealing component to the cylinder, the elastic seals located inside the front sealing component and the rear sealing component are squeezed and deformed by the two ends of the cylinder. At this time, the elastic wave plate located inside the elastic seal is squeezed and deformed. Therefore, under the elastic force of the elastic wave plate, the outer sides of the two elastic seals can be tightly attached to the two ends of the cylinder, thereby preventing the hydraulic oil from leaking from the interfaces on both sides of the cylinder.

[0016] 2. The present invention provides a rear sealing component. When the piston rod lifts the weight, if the oil inlet pipeline is ruptured or pressure-depleted, the object acting on the outside of the piston rod will move downward instantly under the action of gravity and push the piston rod downward. At this time, the piston component moves downward together with the piston rod. As the pressure of the hydraulic oil in the cylinder increases instantly, the baffle block contacts the baffle ring under the thrust of the hydraulic oil and compresses the nitrogen spring. At this time, the hydraulic oil cannot flow through the gap between the baffle block and the baffle ring, which can prevent the hydraulic oil from flowing out of the rear oil guide pipe and prevent the weight from falling downward when the oil inlet pipeline is ruptured or pressure-depleted.

[0017] 3. The present invention sets a front sealing component. After a long period of use, if the sealing effect of the sealing ring deteriorates, a small amount of hydraulic oil will adhere to the surface of the piston rod. When the piston rod extends out of the cylinder, the annular plate and the piston rod slide relative to each other, and the oil adhered to the surface of the piston rod can be scraped off. Then, the elastic scraper cleans the surface of the piston rod again. The compression spring always presses the elastic scraper so that the inner side of the elastic scraper is always in contact with the piston rod, which makes the oil scraping effect better. In this process, the dust isolation ring can prevent external dust and other impurities from entering the cylinder.

[0018] 4. The present invention sets a piston component. During the sliding process of the piston component, under the thrust of the hydraulic oil, the elastic top plate is deformed by force, and expands outward under the limiting action of the retaining ring, pushing the rubber sleeve outward. At this time, the rubber ring can fit tightly with the inner wall of the cylinder under the squeezing action of the rubber sleeve. Under the joint sealing of the sealing ring and the rubber ring, the hydraulic oil can be prevented from flowing through the outside of the piston component, resulting in unstable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the present invention;

[0020] Figure 2 is a cross-sectional view of the present invention;

[0021] Figure 3 is an exploded view of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the rear sealing component of the present invention;

[0023] Figure 5 The present invention Figure 4 A schematic diagram of the structure at A;

[0024] Figure 6 It is a structural schematic diagram of the front sealing component of the present invention;

[0025] Figure 7 is a side view of the front sealing component of the present invention;

[0026] Figure 8 It is a structural schematic diagram of the piston component of the present invention.

[0027] In the figure: 1. cylinder barrel; 2. rear sealing component; 3. front sealing component; 4. piston rod; 5. piston component; 21. rear sealing cover; 22. rear oil guide pipe; 23. inner cylinder; 24. annular porous plate; 25. flow control ring; 26. nitrogen spring; 27. flow control block; 28. elastic sealing component; 31. front sealing cover; 32. front oil guide pipe; 33. packaging shell; 34. sealing ring; 35. tension spring; 36. annular plate; 37. elastic scraper; 38. compression spring; 39. dust shield ring; 51. connecting rod; 52. side block; 53. baffle; 54. sealing ring; 55. rubber sleeve; 56. rubber ring; 57. elastic top plate; 58. retaining ring; 59. support ring. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0029] Example: See Figure 1 - Figure 8 The present invention provides a technical solution: a hydraulic cylinder sealing device for producing rubber in a vulcanizing machine, comprising:

[0030] Cylinder 1; rear sealing component 2, the inner side of the rear sealing component 2 is threadedly connected to the outer side of the cylinder 1; front sealing component 3, the inner side of the front sealing component 3 is threadedly connected to the side of the cylinder 1 away from the rear sealing component 2; piston rod 4, the outer wall of the piston rod 4 is slidably connected to the inner side of the front sealing component 3; piston component 5, the outer side of the piston component 5 is slidably connected to the inner wall of the cylinder 1, the piston component 5 is placed inside the cylinder 1, and then it is fixed to the piston rod 4, and then the front sealing component 3 is passed through the piston rod 4 and fixed to the cylinder 1, and finally the rear sealing component 2 is fixed to the cylinder 1, thereby completing the assembly of the device, and then the device is connected to the oil tank with the reversing valve, and then the device can work normally;

[0031] The rear sealing component 2 includes a rear sealing cover 21, the top of the rear sealing cover 21 is fixedly connected with a rear oil guide pipe 22, the bottom of the rear oil guide pipe 22 is provided with an inner cylinder 23, the inner side of the inner cylinder 23 is fixedly connected with an annular porous plate 24, the inner side of the inner cylinder 23 is fixedly connected with a baffle ring 25, a nitrogen spring 26 is fixedly connected at the center of the inner side of the rear sealing cover 21, one end of the nitrogen spring 26 away from the rear sealing cover 21 is fixedly connected with a baffle block 27, an elastic sealing member 28 is provided on the outer side of the baffle block 27, the outer side of the inner cylinder 23 is fixedly connected with the inner side of the rear sealing cover 21, the inner side of the rear sealing cover 21 is threadedly connected with the outer side of the cylinder 1, the inner side of the cylinder 1 is slidably connected with the outer side of the inner cylinder 23, and the number of the elastic sealing members 28 is two. The outer side of the elastic seal 28 contacts the outer side of the cylinder 1, the outer side of the baffle ring 25 contacts the outer side of the baffle block 27, and the outer side of the baffle block 27 contacts the outer side of the annular porous plate 24. When the rear oil guide pipe 22 is filled with oil, the hydraulic oil can enter the inner tube 23 through the rear cover 21, and then flow out from the annular porous plate 24 after passing through the baffle ring 25 and the baffle block 27, and enter the cylinder 1. At this time, as the hydraulic oil in the chamber of the cylinder 1 close to the rear sealing component 2 gradually increases, the piston component 5 can slide in the cylinder 1 and drive the piston rod 4 to extend during the sliding process;

[0032] When the piston rod 4 lifts the heavy object, if the oil inlet pipeline is ruptured or loses pressure, the object acting on the outside of the piston rod 4 will move downward instantly under the action of gravity and push the piston rod 4 downward. At this time, the piston component 5 moves downward together with the piston rod 4. As the pressure of the hydraulic oil in the cylinder 1 increases instantly, the baffle block 27 contacts the baffle ring 25 under the thrust of the hydraulic oil and compresses the nitrogen spring 26. At this time, the hydraulic oil cannot flow through the gap between the baffle block 27 and the baffle ring 25, which can prevent the hydraulic oil from flowing out from the rear. The oil flows out from the oil guide pipe 22, and can also prevent heavy objects from falling downward when the oil inlet pipeline is broken or depressurized. In the process of fixing the front sealing component 3 and the rear sealing component 2 to the cylinder barrel 1, the elastic seals 28 located on the inner sides of the front sealing component 3 and the rear sealing component 2 are squeezed and deformed by the two ends of the cylinder barrel 1. At this time, the elastic wave plate located on the inner side of the elastic seal 28 is squeezed and deformed. Therefore, under the elastic force of the elastic wave plate, the outer sides of the two elastic seals 28 can be tightly attached to the two ends of the cylinder barrel 1, thereby preventing the hydraulic oil from leaking from the interfaces on both sides of the cylinder barrel 1.

[0033] The front sealing component 3 includes a front sealing cover 31, the top of the front sealing cover 31 is fixedly connected to the front oil guide pipe 32, the outer side of the front sealing cover 31 is fixedly connected to the sealing shell 33 by bolts, the inner wall of the front sealing cover 31 is clamped with a sealing ring 34, the inner wall of the front sealing cover 31 is fixedly connected to the outer side of the elastic sealing member 28, the inner side of the front sealing cover 31 is threadedly connected to the outer side of the cylinder 1, the center of the front sealing cover 31 is slidably connected to the outer wall of the piston rod 4, the outer wall of the piston rod 4 is slidably connected to the inner side of the sealing ring 34, the inner side of the sealing shell 33 is slidably connected to the outer wall of the piston rod 4, the inner wall of the sealing shell 33 is fixedly connected to a tension spring 35, the end of the tension spring 35 away from the sealing shell 33 is fixedly connected to an annular plate 36, the inner wall of the sealing shell 33 is fixedly connected to an elastic scraper 37, the outer wall of the elastic scraper 37 is fixedly connected to a compression spring 38, the outer side of the sealing shell 33 is fixedly connected to a dust isolation ring 39, the annular plate The inner side of 36 is slidably connected to the outer wall of the piston rod 4, the outer wall of the piston rod 4 is slidably connected to the inner side of the elastic scraper 37, the inner side of the dust isolation ring 39 is slidably connected to the outer wall of the piston rod 4, and the end of the compression spring 38 away from the elastic scraper 37 is fixedly connected to the inner wall of the packaging shell 33. When the device is used normally, if the piston rod 4 needs to be retracted into the cylinder 1, the reversing valve needs to change the oil circuit so that the hydraulic oil enters from the front oil guide pipe 32. At this time, the hydraulic oil enters the cylinder 1 through the front sealing cover 31. At this time, as the hydraulic oil in the chamber on one side of the cylinder 1 close to the front sealing component 3 gradually increases, the piston component 5 can slide in the cylinder 1 and drive the piston rod 4 to retract into the cylinder 1 during the sliding process. At the same time, under the elastic force of the nitrogen spring 26, the hydraulic oil on the other side of the cylinder 1 can flow through the gap between the baffle block 27 and the baffle ring 25, and finally return to the oil tank through the rear oil guide pipe 22;

[0034] During the sliding of the piston rod 4, the sealing ring 34 can seal the front cover 31 to prevent the piston rod 4 from bringing out the hydraulic oil during operation. After a long period of use, if the sealing effect of the sealing ring 34 becomes poor, a small amount of hydraulic oil will adhere to the surface of the piston rod 4. When the piston rod 4 extends out of the cylinder 1, the annular plate 36 and the piston rod 4 slide relative to each other, and the oil adhered to the surface of the piston rod 4 can be scraped off. The tension spring 35 changes the rigid connection between the annular plate 36 and the packaging shell 33 into a flexible connection, reducing the resistance encountered by the piston rod 4 during operation. Afterwards, the elastic scraper 37 cleans the surface of the piston rod 4 again, and the compression spring 38 always presses the elastic scraper 37 so that the inner side of the elastic scraper 37 is always in contact with the piston rod 4, making the oil scraping effect better. During this process, the dust isolation ring 39 can prevent external dust and other impurities from entering the cylinder 1.

[0035] The piston component 5 includes a connecting rod 51, and side blocks 52 are fixedly connected to both ends of the connecting rod 51. The outer wall of the connecting rod 51 is symmetrically slidably connected to a baffle 53, and a sealing ring 54 is clamped on the outer side of the baffle 53. A rubber sleeve 55 is fixedly connected to the outer wall of the baffle 53, and a rubber ring 56 is clamped on the outer side of the rubber sleeve 55. An elastic top plate 57 is fixedly connected to the inner wall of the baffle 53, and a support ring 59 is fixedly connected to the inner side of the rubber sleeve 55. The outer side of the elastic top plate 57 is clamped with the inner side of the rubber ring 56 through a clamping ring 58, and the outer side of the clamping ring 58 is fixedly connected to the inner side of the rubber ring 56. The outer sides of the sealing ring 54 and the rubber ring 56 are both slidably connected to the inner wall of the cylinder 1, and the support ring 59 is linearly arranged along the central axis of the rubber sleeve 55. In the process of sliding of the piston component 5, the hydraulic oil pushes the baffle 53 on one side to slide along the surface of the connecting rod 51. At this time, under the thrust of the hydraulic oil, the elastic top plate 57 fixedly connected to the baffle 53 is deformed by force, and expands outward under the limiting action of the retaining ring 58, and pushes the rubber sleeve 55 outward. At this time, the rubber ring 56 can fit tightly with the inner wall of the cylinder 1 under the extrusion of the rubber sleeve 55. Under the joint sealing of the sealing ring 54 and the rubber ring 56, the hydraulic oil can be prevented from flowing through the outside of the piston component 5, resulting in unstable operation of the device. Among them, the side block 52 limits the sliding stroke of the baffle 53, and the support ring 59 can support the rubber sleeve 55 to prevent the rubber sleeve 55 from expanding inward when squeezed.

[0036] Working principle:

[0037] When in use, the piston component 5 is placed inside the cylinder 1, and then fixed to the piston rod 4, and then the front sealing component 3 is passed through the piston rod 4 and fixed to the cylinder 1, and finally the rear sealing component 2 is fixed to the cylinder 1, so that the assembly of the device can be completed, and then the device is connected to the oil tank with the reversing valve, and then the device can work normally;

[0038] In the process of fixing the front sealing component 3 and the rear sealing component 2 to the cylinder barrel 1, the elastic seals 28 located on the inner sides of the front sealing component 3 and the rear sealing component 2 are squeezed and deformed by the two ends of the cylinder barrel 1. At this time, the elastic wave plate located on the inner side of the elastic seal 28 is squeezed and deformed. Therefore, under the elastic force of the elastic wave plate, the outer sides of the two elastic seals 28 can be tightly attached to the two ends of the cylinder barrel 1, thereby preventing the hydraulic oil from leaking from the interfaces on both sides of the cylinder barrel 1.

[0039] When oil is injected into the rear oil guide pipe 22, the hydraulic oil can enter the inner tube 23 through the rear cover 21, and then flow out from the annular porous plate 24 after passing through the baffle ring 25 and the baffle block 27, and enter the cylinder 1. At this time, as the hydraulic oil in the chamber of the cylinder 1 close to the rear seal component 2 gradually increases, the piston component 5 can slide in the cylinder 1, and drive the piston rod 4 to extend during the sliding process;

[0040] When the piston rod 4 lifts up the heavy object, if the oil inlet pipeline is broken or loses pressure, the object acting on the outside of the piston rod 4 will move downward instantly under the action of gravity and push the piston rod 4 downward. At this time, the piston component 5 moves downward together with the piston rod 4. As the pressure of the hydraulic oil in the cylinder 1 increases instantly, the baffle block 27 contacts the baffle ring 25 under the thrust of the hydraulic oil and compresses the nitrogen spring 26. At this time, the hydraulic oil cannot flow through the gap between the baffle block 27 and the baffle ring 25, which can prevent the hydraulic oil from flowing out of the rear oil guide pipe 22 and prevent the heavy object from falling downward when the oil inlet pipeline is broken or loses pressure.

[0041] When the device is in normal use, if the piston rod 4 needs to be retracted into the cylinder 1, the reversing valve needs to change the oil circuit so that the hydraulic oil enters from the front oil guide pipe 32. At this time, the hydraulic oil enters the cylinder 1 through the front sealing cover 31. At this time, as the hydraulic oil in the chamber on the side of the cylinder 1 close to the front sealing component 3 gradually increases, the piston component 5 can slide in the cylinder 1 and drive the piston rod 4 to retract into the cylinder 1 during the sliding process. At the same time, under the elastic force of the nitrogen spring 26, the hydraulic oil on the other side of the cylinder 1 can flow through the gap between the baffle block 27 and the baffle ring 25, and finally return to the oil tank through the rear oil guide pipe 22;

[0042] During the sliding of the piston rod 4, the sealing ring 34 can seal the front cover 31 to prevent the piston rod 4 from bringing out the hydraulic oil during operation. After a long period of use, if the sealing effect of the sealing ring 34 becomes poor, a small amount of hydraulic oil will adhere to the surface of the piston rod 4. When the piston rod 4 extends out of the cylinder barrel 1, the annular plate 36 slides relative to the piston rod 4 to scrape off the oil adhered to the surface of the piston rod 4. The tension spring 35 changes the rigid connection between the annular plate 36 and the packaging shell 33 into a flexible connection, reducing the resistance encountered by the piston rod 4 during operation. Afterwards, the elastic scraper 37 cleans the surface of the piston rod 4 again. The compression spring 38 always presses the elastic scraper 37 so that the inner side of the elastic scraper 37 is always in contact with the piston rod 4, making the oil scraping effect better. During this process, the dust isolation ring 39 can prevent external dust and other impurities from entering the cylinder barrel 1.

[0043] During the sliding of the piston component 5, the hydraulic oil pushes the baffle 53 on one side to slide along the surface of the connecting rod 51. At this time, under the thrust of the hydraulic oil, the elastic top plate 57 fixedly connected to the baffle 53 is deformed by force, and expands outward under the limiting action of the retaining ring 58, and pushes the rubber sleeve 55 outward. At this time, the rubber ring 56 can fit tightly with the inner wall of the cylinder 1 under the extrusion of the rubber sleeve 55. Under the joint sealing of the sealing ring 54 and the rubber ring 56, the hydraulic oil can be prevented from flowing through the outside of the piston component 5, resulting in unstable operation of the device. Among them, the side block 52 limits the sliding stroke of the baffle 53, and the support ring 59 can support the rubber sleeve 55 to prevent the rubber sleeve 55 from expanding inward when squeezed.

[0044] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A hydraulic cylinder sealing device for vulcanizing machine for producing rubber, characterized in that: include: Cylinder barrel (1); A rear sealing component (2), the inner side of the rear sealing component (2) being threadably connected to the outer side of the cylinder barrel (1); A front sealing component (3), the inner side of the front sealing component (3) being threadedly connected to a side of the cylinder barrel (1) away from the rear sealing component (2); A piston rod (4), wherein an outer wall of the piston rod (4) is slidably connected to an inner side of the front sealing component (3); A piston component (5), the outer side of the piston component (5) being slidably connected to the inner wall of the cylinder (1); The rear sealing component (2) comprises a rear sealing cover (21), the top of the rear sealing cover (21) is fixedly connected to a rear oil guide pipe (22), the bottom of the rear oil guide pipe (22) is provided with an inner cylinder (23), the inner side of the inner cylinder (23) is fixedly connected to an annular porous plate (24), the inner side of the inner cylinder (23) is fixedly connected to a flow blocking ring (25), the center of the inner side of the rear sealing cover (21) is fixedly connected to a nitrogen spring (26), one end of the nitrogen spring (26) away from the rear sealing cover (21) is fixedly connected to a flow blocking block (27), and an elastic sealing member (28) is provided on the outer side of the flow blocking block (27); The outer side of the inner cylinder (23) is fixedly connected to the inner side of the rear cover (21), the inner side of the rear cover (21) is threadedly connected to the outer side of the cylinder (1), the inner side of the cylinder (1) is slidably connected to the outer side of the inner cylinder (23), and the elastic sealing members (28) are two in number and are respectively fixedly connected to the inner sides of the rear cover (21) and the front sealing member (3); The outer side of the elastic sealing member (28) contacts the outer side of the cylinder barrel (1), the outer side of the baffle ring (25) contacts the outer side of the baffle block (27), and the outer side of the baffle block (27) contacts the outer side of the annular porous plate (24); The front sealing component (3) comprises a front sealing cover (31), the top of the front sealing cover (31) is fixedly connected to a front oil guide pipe (32), the outer side of the front sealing cover (31) is fixedly connected to a sealing shell (33) via bolts, the inner wall of the front sealing cover (31) is clamped with a sealing ring (34), and the inner wall of the front sealing cover (31) is fixedly connected to the outer side of the elastic sealing component (28); A tension spring (35) is fixedly connected to the inner wall of the encapsulation shell (33); an end of the tension spring (35) away from the encapsulation shell (33) is fixedly connected to an annular plate (36); an elastic scraper (37) is fixedly connected to the inner wall of the encapsulation shell (33); a compression spring (38) is fixedly connected to the outer wall of the elastic scraper (37); and a dust isolation ring (39) is fixedly connected to the outer side of the encapsulation shell (33).

2. A hydraulic cylinder sealing device for producing rubber in a vulcanizing machine according to claim 1, characterized in that: The inner side of the front cover (31) is threadedly connected to the outer side of the cylinder barrel (1), the center of the front cover (31) is slidably connected to the outer wall of the piston rod (4), the outer wall of the piston rod (4) is slidably connected to the inner side of the sealing ring (34), and the inner side of the sealing shell (33) is slidably connected to the outer wall of the piston rod (4).

3. A hydraulic cylinder sealing device for producing rubber in a vulcanizing machine according to claim 1, characterized in that: The inner side of the annular plate (36) is slidably connected to the outer wall of the piston rod (4), the outer wall of the piston rod (4) is slidably connected to the inner side of the elastic scraper (37), the inner side of the dust isolation ring (39) is slidably connected to the outer wall of the piston rod (4), and one end of the compression spring (38) away from the elastic scraper (37) is fixedly connected to the inner wall of the packaging shell (33).

4. A hydraulic cylinder sealing device for producing rubber in a vulcanizing machine according to claim 1, characterized in that: The piston component (5) comprises a connecting rod (51), both ends of the connecting rod (51) are fixedly connected to side blocks (52), the outer wall of the connecting rod (51) is symmetrically slidably connected to a baffle plate (53), the outer side of the baffle plate (53) is clamped with a sealing ring (54), the outer wall of the baffle plate (53) is fixedly connected to a rubber sleeve (55), the outer side of the rubber sleeve (55) is clamped with a rubber ring (56), the inner wall of the baffle plate (53) is fixedly connected to an elastic top plate (57), and the inner side of the rubber sleeve (55) is fixedly connected to a support ring (59).

5. A hydraulic cylinder sealing device for producing rubber in a vulcanizing machine according to claim 4, characterized in that: The outer side of the elastic top plate (57) is clamped to the inner side of the rubber ring (56) via a clamping ring (58), and the outer side of the clamping ring (58) is fixedly connected to the inner side of the rubber ring (56). The outer sides of the sealing ring (54) and the rubber ring (56) are both slidably connected to the inner wall of the cylinder (1). The support ring (59) is linearly arranged along the central axis of the rubber sleeve (55).

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