Exhaust part with small holes, shoe sleeve tensioning hydraulic cylinder and shoe pressure loading hydraulic cylinder

Abstract

The utility model provides an exhaust part with small holes, a shoe sleeve tensioning hydraulic cylinder and a shoe pressure loading hydraulic cylinder. An exhaust part with small holes comprises an exhaust part body, a through hole is formed in the exhaust part body, and at least one section of the through hole is the small hole with the diameter not larger than 0.3 mm. The shoe pressure loading hydraulic cylinder comprises a piston and a cylinder barrel; the piston is provided with an exhaust channel; an exhaust part body is detachably arranged on the piston; one end of the through hole of the exhaust piece body is communicated with the highest position of the cavity, and the other end is communicated with the exhaust channel. The shoe sleeve tensioning hydraulic cylinder comprises a fixed plate fixedly arranged below the shoe core; a gas channel is arranged on the fixing plate, one end of the gas channel is arranged at the mounting end of the exhaust part body, and a gas pipe is arranged at the other end of the gas channel and connected with a cavity of the shoe sleeve tensioning hydraulic cylinder. According to the utility model, the small holes below 0.3 mm are used for exhausting air; the problem of loading force fluctuation caused by residual air in a hydraulic cylinder and a hydraulic pipeline is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to papermaking field, and specifically relates to a kind of small hole exhaust member and boot cover tension hydraulic cylinder and boot pressure loading hydraulic cylinder. BACKGROUND

[0002] There are many hydraulic cylinders in papermaking equipment, and the pressure holding time is long when pressurizing, and the pressure needs to be constant. For example, the loading hydraulic cylinder of the shoe roll in the shoe press needs to be continuously loaded for several hundred hours when working, and the loading force needs to be constant and cannot fluctuate. When working, due to continuous loading, the hydraulic oil in the hydraulic cylinder and the hydraulic pipeline is in a relatively static state and flows rarely. Due to the structure of the hydraulic pipeline and the air contained in the hydraulic oil, a certain amount of air is easily stored in the loading hydraulic cylinder. Because air is compressible, it often causes oil pressure fluctuation when working, causing the loading force to fluctuate. Similarly, air is also stored in the boot cover tension hydraulic cylinder, causing the boot cover tension force to fluctuate. These pressure fluctuations will affect the performance of the boot press. The existing exhaust structure in the hydraulic cylinder is mostly an exhaust valve, which has a complex structure, such as the structure in patent CN112709726A hydraulic cylinder with exhaust function. A structure that can be easily exhausted with simple structure and convenient operation is needed. SUMMARY

[0003] The utility model provides a kind of small hole exhaust member and boot cover tension hydraulic cylinder and boot pressure loading hydraulic cylinder.

[0004] The utility model discloses a kind of small hole exhaust member, including exhaust member body, the through hole is set in the exhaust member body, at least one section in the through hole is small hole with diameter not more than 0.3 millimeter;The size of the small hole is less than the size of other positions of through hole;Mounting end is set on the exhaust member body.

[0005] The mounting end is set in one end of through hole, and the exhaust member body is set on the product needing exhaust by mounting end;The one end of through hole is communicated with the high position of the cavity of product needing exhaust, and the other end is communicated with atmosphere.

[0006] Including fixed plate, the exhaust member body can be detachably set on the fixed plate;The through hole of the exhaust member body is communicated with the gas pipe connected with the product cavity needing exhaust;The exhaust member body and gas pipe first end are detachably connected;The height of the exhaust member is higher than the height of liquid in the product cavity needing exhaust.

[0007] The mounting end is set in any one end of through hole;The fixed plate is provided with through hole as gas passage;The mounting end is detachably set in one end of the gas passage, and the gas pipe is detachably set in the other end of the gas passage.

[0008] The mounting end is cylindrical, and the outer surface of the mounting end is a light axis or is provided with external threads; the small hole is located in the middle section of the through hole, the upper section of the through hole is a conical hole, and the small end of the conical hole is communicated with the small hole; the lower section of the through hole is a cylindrical hole, one end of the cylindrical hole is communicated with the small hole through a tapered transition hole; the cylindrical hole is located in the mounting end, and the conical hole is away from the mounting end; one end of the exhaust member body away from the mounting end is provided with a slot; the diameter of the small hole is between 0.1 mm and 0.3 mm; and the material of the exhaust member body is a corrosion-resistant and wear-resistant material.

[0009] The boot pressure loading hydraulic cylinder with a small-hole exhaust member comprises a piston fixed to a boot core at an upper end and a cylinder barrel fixed to a boot plate at a lower end; a cavity for setting hydraulic oil is formed between the piston and the cylinder barrel; an oil inlet is arranged at the bottom of the cylinder barrel; an exhaust passage is arranged on the piston and communicated with the outside; the exhaust member body is detachably arranged on the piston; a through hole of the exhaust member body is communicated with the highest position of the cavity at one end and communicated with the exhaust passage at the other end.

[0010] The piston is in the shape of a reversed cylindrical, a center hole is arranged at the center position of the top of the piston and communicated with the cavity in the cylinder; the center hole is a stepped hole with a large upper part and a small lower part, the bottom surface of the large hole of the center hole is provided with a mounting hole; the mounting end of the exhaust member body is arranged in the mounting hole, and the other end of the exhaust member body is close to the highest position in the large hole of the center hole; the exhaust passage is located below the mounting hole and intersects with the mounting hole.

[0011] The boot sleeve tensioning hydraulic cylinder with a small-hole exhaust member comprises a fixed plate fixedly arranged below a boot core; a tensioning boot sleeve is arranged at the left side of the boot sleeve tensioning hydraulic cylinder, and the bottom of the fixed plate is arranged at the right side; a gas passage is arranged on the fixed plate, the mounting end of the exhaust member body is arranged at one end of the gas passage, and a gas pipe is detachably arranged at the other end of the gas passage, and the other end of the gas pipe is connected to the cavity of the boot sleeve tensioning hydraulic cylinder.

[0012] Compared with the prior art, the boot pressure loading hydraulic cylinder with a small-hole exhaust member adopts a small hole with a diameter of less than 0.3 mm for exhaust resistance for the first time, and the problem of loading force fluctuation caused by residual air in the hydraulic cylinder and hydraulic pipeline is solved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic view of the boot pressure loading hydraulic cylinder with a small-hole exhaust member.

[0014] Figure 2 is a schematic view of the installation of the boot pressure loading hydraulic cylinder with a small-hole exhaust member.

[0015] Figure 3 is a schematic view of the installation of the boot sleeve tensioning hydraulic cylinder with a small-hole exhaust member.

[0016] Figure 4 is Figure 3 is

[0017] Wherein, 1 is trachea, 2 is fixed plate, 20 is gas passage, 3 is exhaust member body, 30 is small hole, 31 is mounting end, 32 is one slot, 33 is conical hole, 4 is boot core, 5 is piston, 50 is exhaust passage, 51 is center hole, 6 is boot plate, 7 is cylinder, 8 is oil inlet and outlet, 9 is boot tensioning hydraulic cylinder, 10 is tensioning boot. DETAILED DESCRIPTION

[0018] In the present application, unless otherwise explicitly specified and limited, the technical terms used in the present application should be understood as the common meanings understood by the skilled person in the present application. The terms "connected", "connected", "fixed", "provided" and the like should be broadly understood, which can be fixed connection, can also be detachable connection, or integrated; can be directly connected, or indirectly connected through an intermediate medium; can be mechanical connection, or electrical connection. Unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can be the direct contact of the first and second features, or indirectly contact through an intermediate medium. Moreover, the first feature "above" or "above" or "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below" or "below" or "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature. Relationship terms such as first, second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. The terms used in the description, such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation.

[0019] The technical scheme of the present application will be described clearly and completely in combination with the drawings and specific embodiments. As Figures 1-4As shown, a small hole exhaust element includes an exhaust element body 3, a through hole is arranged in the exhaust element body 3, at least one section of the through hole is a small hole 30 with a diameter of not more than 0.3 mm; the size of the small hole 30 is smaller than the size of other positions of the through hole; and a mounting end 31 is arranged on the exhaust element body 3. The small hole 30 is arranged in the through hole, and is currently used for throttling and distributing flow, at which time the size of the small hole 30 is greater than 0.5 mm. Generally, the size can be arranged between 0.5 mm and 2 mm. The present utility model first adopts the small hole 30 with a diameter of less than 0.3 mm to exhaust and block flow. According to actual needs, the smaller the diameter of the small hole 30 is, the better. However, too small a hole is not easy to process, and the processing difficulty and cost will increase a lot. The diameter of the small hole 30 is preferably arranged between 0.1 mm and 0.3 mm. When the viscosity of hydraulic oil passing through the small hole 30 is large, a large value is taken, and when the viscosity is small, a small value is taken. When the diameter of the small hole 30 is less than 0.3 mm, the small hole 30 is arranged at a suitable position of other products, such as a position with the highest liquid level, and can achieve exhaust. The mounting end 31 can be directly arranged on a product to be mounted, or the mounting end 31 is connected with a pipeline, and the pipeline is connected with the product to be mounted. The mounting end 31 is preferably arranged at a position of an end, such as a position of both ends of the through hole. The mounting end 31 can also be arranged at a position corresponding to a middle position of the through hole on the exhaust element body 3 according to needs.

[0020] Preferably, the mounting end 31 is arranged at one end of the through hole, the exhaust element body 3 is directly arranged on a product to be exhausted through the mounting end 31; one end of the through hole is communicated with a high position of a cavity of the product to be exhausted, and the other end is communicated with the atmosphere. The exhaust element is generally arranged at a highest position of a product to be exhausted, such as a hydraulic cylinder body or a hydraulic pipeline, to facilitate exhaust of the hydraulic pipeline.

[0021] Preferably, the mounting end 31 is arranged at one end of the through hole, the exhaust element body 3 is directly arranged on a product to be exhausted through the mounting end 31; one end of the through hole is communicated with a high position of a cavity of the product to be exhausted, and the other end is communicated with the atmosphere. The exhaust element is generally arranged at a highest position of a product to be exhausted, such as a hydraulic cylinder body or a hydraulic pipeline, to facilitate exhaust of the hydraulic pipeline.

[0022] Further, the mounting end 31 is arranged at any one end of the through hole; the fixing plate 2 is provided with a through hole as a gas passage 20; the mounting end 31 is detachably arranged at one end of the gas passage 20, and the gas pipe 1 is detachably arranged at the other end of the gas passage 20. Indirect connection can be realized through the gas passage 20 on the fixing plate 2.

[0023] Specifically, the mounting end 31 is cylindrical, and the outer surface of the mounting end 31 is a light shaft or is provided with external threads; the small hole 30 is located in the middle section of the through hole, the upper section of the through hole is a conical hole 33, and the small end of the conical hole 33 is in communication with the small hole 30; the lower section of the through hole is a cylindrical hole, one end of the cylindrical hole is in communication with the small hole 30 through a tapered transition hole; the cylindrical hole is located at the mounting end 31, and the conical hole 33 is away from the mounting end 31; a T-shaped groove 32 is arranged at one end of the exhaust member body 3 away from the mounting end 31; the diameter of the small hole 30 is between 0.1 mm and 0.3 mm; and the exhaust member body 3 is made of corrosion-resistant and wear-resistant materials. The width of the T-shaped groove 32 can be 1 mm. The T-shaped groove 32 can facilitate the use of a screwdriver or other tools to install or detach the exhaust member body 3 of the utility model on or from a product. The exhaust member body 3 can be made of copper alloy or stainless steel. The mounting end 31 is connected to other products, such as a hydraulic cylinder, through threads. Of course, the mounting end 31 can also be a light shaft and be matched with a hole on other products. Alternatively, the mounting end 31 can be arranged on other products through bolt connection. The threads of the mounting end 31 can be M4-M6 external threads.

[0024] As shown in Figure 2 A boot pressure loading hydraulic cylinder with a small-hole exhaust member is adopted, which comprises a piston 5 fixed with a boot core 4 at an upper end and a cylinder barrel 7 fixed with a boot plate 6 at a lower end; a cavity for arranging hydraulic oil is formed between the piston 5 and the cylinder barrel 7; an oil inlet 8 is arranged at the bottom of the cylinder barrel 7; and the piston 5 is provided with an exhaust passage 50 in communication with the outside; the exhaust member body 3 is detachably arranged on the piston 5; one end of the through hole of the exhaust member body 3 is in communication with the highest position of the cavity, and the other end is in communication with the exhaust pipe 1.

[0025] Further, the piston 5 is a reverse buckle cylindrical shape, a center hole 51 is arranged in the top center position of the piston 5 and communicates with the inner cavity of the cylinder of the piston 5; the center hole 51 is a stepped hole with a large upper hole and a small lower hole, the bottom surface of the large hole of the center hole 51 is provided with a mounting hole; the mounting end 31 of the exhaust member body 3 is arranged in the mounting hole, the other end of the exhaust member body 3 is close to the highest position in the large hole of the center hole 51; the exhaust pipe 1 is arranged below the mounting hole and intersects with the mounting hole. The exhaust pipe 1 is preferably a transversely arranged blind hole. Other exhaust structures can also be used as long as they can achieve exhaust. The boot pressure loading hydraulic cylinder also has other structures, such as the outer surface of the lower end of the piston 5 is in sliding connection with the inner surface of the cylinder 7, and a dynamic sealing oil seal can be arranged between the two. These belong to the prior art and will not be described in detail.

[0026] In the boot pressure loading hydraulic cylinder of the utility model, the exhaust member is mounted on the hydraulic cylinder body, oil is filled into the hydraulic cylinder through a pipeline during use, and the originally accumulated air in the hydraulic cylinder will gather at the upper part of the hydraulic cylinder. With the filling of hydraulic oil, the air is discharged through the small hole 30 of the exhaust member. There is no air in the hydraulic cylinder, and the loading force will not fluctuate. During use, a small amount of liquid oil will be discharged through the small hole 30, and since the boot pressure loading hydraulic cylinder is installed in a closed space and a large amount of oil exists in the closed space due to the need for lubrication, cooling and the like, the small amount of oil discharged through the small hole 30 will not cause oil leakage and pollution problems. In addition, since the amount of oil discharged is very small and the oil inlet diameter of the loading hydraulic cylinder is very large, the small amount of oil discharge will not cause the oil pressure of the loading hydraulic cylinder to decrease.

[0027] As shown in Figure 3 and 4 , a boot sleeve tensioning hydraulic cylinder 9 with a small hole 30 exhaust member is adopted, which comprises a fixed plate 2 fixedly arranged below a boot core 4; the boot sleeve tensioning hydraulic cylinder 9 is arranged between the left tensioning boot sleeve 10 and the bottom of the fixed plate 2 on the right; a gas passage 20 is arranged on the fixed plate 2, one end of the gas passage 20 is provided with a mounting end 31 of the exhaust member body 3, and the other end is detachably provided with a gas pipe 1, and the other end of the gas pipe 1 is connected to the cavity of the boot sleeve tensioning hydraulic cylinder 9. Since it is not convenient to install the exhaust member on the body of the boot sleeve tensioning hydraulic cylinder 9, a hose is used as the gas pipe 1 to lead out the exhaust member body 3 and install it on the fixed plate 2 of the hydraulic cylinder base.

[0028] In specific implementation: according to the need, the exhaust member body 3 is mounted on the hydraulic cylinder body to achieve exhaust. Or the exhaust member body 3 is mounted outside the hydraulic cylinder, and the exhaust is achieved by connecting the internal cavity of the hydraulic cylinder through the gas pipe 1.

[0029] Any combination of the technical features in the above-described embodiments can be made, as long as the combination of the technical features does not contradict, it shall be considered as the scope recorded in the description. Without departing from the overall concept of the present application, according to the technical scheme of the present application and equivalent replacement or change, and several changes and improvements made, should also be considered as the protection scope of the present application.

Claims

1. A venting component with small holes, characterized in that: The device includes an exhaust component body, which has a through hole, at least one section of which is a small hole with a diameter of no more than 0.3 mm; the size of the small hole is smaller than the size of other parts of the through hole; and the exhaust component body has an installation end.

2. The exhaust component with small holes according to claim 1, characterized in that: The mounting end is located at one end of the through hole, and the exhaust component body is mounted on the product that needs to be vented through the mounting end; one end of the through hole is connected to the high position of the cavity of the product that needs to be vented, and the other end is connected to the atmosphere.

3. The exhaust component with small holes according to claim 1, characterized in that: The device includes a fixed plate, and the exhaust component body is detachably mounted on the fixed plate; the through hole of the exhaust component body connects to an air pipe at its end, which is connected to the product cavity that needs to be vented; the exhaust component body is detachably connected to the beginning of the air pipe; the height of the exhaust component is higher than the height of the liquid in the product cavity that needs to be vented.

4. The exhaust component with small holes according to claim 3, characterized in that: The mounting end is located at either end of the through hole; the fixing plate has a through hole as a gas channel; the mounting end is detachably located at one end of the gas channel, and the gas pipe is detachably located at the other end of the gas channel.

5. The venting component with small holes according to claim 2, characterized in that: The mounting end is cylindrical, and its outer surface is either a smooth shaft or has an external thread. The small hole is located in the middle section of the through hole, the upper section of which is a conical hole, and the small end of the conical hole is connected to the small hole. The lower section of the through hole is a cylindrical hole, one end of which is connected to the small hole through a conical transition hole. The cylindrical hole is located at the mounting end, and the conical hole is located away from the mounting end. A slot is provided on the end of the exhaust component body away from the mounting end. The diameter of the small hole is between 0.1 mm and 0.3 mm. The exhaust component body is made of a corrosion-resistant and wear-resistant material.

6. A shoe-pressure loading hydraulic cylinder with a small-hole venting component as described in any one of claims 1, 2, or 5, comprising a piston fixed at its upper end to the shoe core and a cylinder barrel fixed at its lower end to the shoe plate; the piston and the cylinder barrel form a cavity for discharging hydraulic oil; an oil inlet is provided at the bottom of the cylinder barrel; characterized in that: The piston is provided with an exhaust channel that communicates with the outside at one end; the exhaust component body is detachably provided on the piston; one end of the through hole of the exhaust component body is connected to the highest position of the cavity, and the other end is connected to the exhaust channel.

7. The shoe-pressure loading hydraulic cylinder according to claim 6, characterized in that: The piston is an inverted cylindrical shape, and a central hole communicating with the inner cavity of the piston is provided at the center of the top of the piston; the central hole is a stepped hole that is larger at the top and smaller at the bottom, and a mounting hole is provided on the bottom surface of the larger hole of the central hole; the mounting end of the exhaust component body is located in the mounting hole, and the other end of the exhaust component body is located near the highest position in the larger hole of the central hole; the exhaust channel is located below the mounting hole and intersects with the mounting hole.

8. A shoe sleeve tensioning hydraulic cylinder with a perforated venting component as described in any one of claims 1, 4, or 5, characterized in that: It includes a fixing plate fixedly installed below the boot core; the two ends of the boot tensioning hydraulic cylinder are located between the bottom of the left tensioning boot and the right fixing plate; a gas channel is provided on the fixing plate, one end of the gas channel is located at the mounting end of the exhaust component body, and the other end is detachably provided with an air pipe, the other end of the air pipe is connected to the cavity of the boot tensioning hydraulic cylinder.

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