High-sealing-performance oil cylinder with sealing leakage monitoring function

Abstract

The utility model discloses a high-sealing-performance oil cylinder with a sealing leakage monitoring function. The high-sealing-performance oil cylinder comprises a cylinder barrel and a piston rod, a partition plate is arranged at the tail end of the piston rod, a left piston and a right piston are arranged on the two sides of the partition plate, and a middle sealing strip is arranged on the periphery of the partition plate. A first longitudinal channel, a second longitudinal channel, a first communication channel and a second communication channel are arranged in the piston rod; a first piston rod annular groove and a second piston rod annular groove are symmetrically formed in the side, close to the partition plate, of the piston rod, the first communication channel is communicated with the first piston rod annular groove, and the second communication channel is communicated with the second piston rod annular groove. The left piston and the right piston are provided with third communication channels communicated with the annular channel, and one end of the inner side of each third communication channel is communicated with the first piston rod annular groove and the second piston rod annular groove. According to the utility model, the sealing performance is enhanced and the leakage is monitored in real time through the double pistons and a multi-sealing matching structure and the communication of the piston rods and the channels in the pistons and the monitoring device.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oil cylinder manufacturing, especially a high sealing oil cylinder with sealing leakage monitoring function. BACKGROUND

[0002] The current market oil cylinder generally exists the problem that sealing performance monitoring and maintenance are inconvenient. First, most oil cylinders adopt simple single piston sealing structure, lack multiple protection, when the sealing element appears wear or aging, hydraulic oil leakage is prone to occur, and it is difficult to quickly locate the leakage point. Second, the traditional oil cylinder lacks effective real-time monitoring device, and the subtle leakage of the piston sealing place cannot be found in time, and it is usually not until the system pressure is obviously reduced, the equipment operation is abnormal or the oil leaks a lot that the leakage can be detected, resulting in maintenance lag, affecting the normal operation of the equipment. Third, if the piston sealing fails, the traditional oil cylinder often needs to replace the entire sealing assembly or piston part, and the selective replacement of a single piston cannot be realized, resulting in increased maintenance cost, resource waste and low maintenance efficiency. SUMMARY

[0003] The utility model aims at providing a high sealing oil cylinder with sealing leakage monitoring function which can monitor oil sealing in real time.

[0004] The utility model discloses a high sealing oil cylinder with sealing leakage monitoring function, which comprises a cylinder barrel, a piston rod is arranged in the cylinder barrel, a partition plate is arranged at the end of the piston rod, left and right pistons are arranged on both sides of the partition plate, the left and right pistons are symmetrically arranged, and a middle sealing strip is arranged on the outer periphery of the partition plate. A first longitudinal channel and a second longitudinal channel are arranged in the piston rod, a first communication channel radially extending to the outer surface of the piston rod is arranged at the end of the inner side of the first longitudinal channel, and a second communication channel radially extending to the outer surface of the piston rod is arranged at the end of the inner side of the second longitudinal channel. A first piston rod annular groove and a second piston rod annular groove are symmetrically arranged on the side of the piston rod close to the partition plate, the first communication channel is communicated with the first piston rod annular groove, and the second communication channel is communicated with the second piston rod annular groove. An annular channel is arranged on the periphery of the side of the left and right pistons close to the partition plate, a third communication channel radially extending to the annular channel is arranged on the left and right pistons, and one end of the third communication channel on the left and right pistons is communicated with the first piston rod annular groove and the second piston rod annular groove respectively.

[0005] Preferably, first protrusions are arranged on the inner diameter surface of the left piston along both sides of the first communication channel and on the inner diameter surface of the right piston along both sides of the third communication channel, first limiting grooves are arranged in the first piston rod annular groove and the second piston rod annular groove by recessing the side surfaces inward, and the first protrusions are matched with the first limiting grooves by being inserted into the first limiting grooves.

[0006] Preferably, the left and right pistons are provided with a stopper outside, the stopper is provided with a second limiting groove at the junction with the piston rod, the left and right pistons are provided with a second protrusion outside, and the second protrusion is limitedly matched with the second limiting groove.

[0007] Preferably, the spacer plate is symmetrically provided with a U-shaped groove on the periphery, the left and right pistons are provided with a third protrusion on one side of the spacer plate, and the third protrusion is insertedly matched with the U-shaped groove.

[0008] Preferably, the spacer plate is symmetrically provided with two groups of third limiting grooves on the outer circumferential surface, and the middle sealing strip is insertedly matched with the third limiting grooves.

[0009] Compared with the prior art, the utility model has the advantages that:

[0010] 1. The three-seal structure is formed by the middle sealing strip, the left and right pistons, the connection stability is enhanced from multiple dimensions by the cooperation of the protrusion of the piston and the piston rod, the limiting groove, the inserted cooperation of the piston and the spacer plate, the hydraulic oil leakage is effectively prevented, and the overall sealing performance of the oil cylinder is improved.

[0011] 2. The channel network inside the piston rod and the piston is designed, and the pressure sensor or the color indicator observation port is matched, so that the leakage condition of the piston sealing place can be captured in real time, hidden troubles can be found in time, and equipment damage and efficiency reduction caused by leakage can be avoided.

[0012] 3. The left and right pistons are independently and symmetrically arranged, when the monitoring device detects that the sealing of a piston fails, the corresponding piston can be individually disassembled and replaced, the overall sealing assembly does not need to be replaced, the maintenance cost and replacement period are significantly reduced, and the economy and convenience of equipment maintenance are improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model.

[0014] Figure 2 It is a structural schematic view of the first limiting groove of the utility model.

[0015] Figure 3 It is a structural schematic view of the second limiting groove of the utility model.

[0016] Figure 4 It is a structural schematic view of the third limiting groove and the U-shaped groove of the utility model.

[0017] Wherein, 1 cylinder, 2 piston rod, 201 first longitudinal channel, 202 second longitudinal channel, 203 first communication channel, 204 second communication channel, 205 first piston rod annular groove, 206 second piston rod annular groove, 3 spacer plate, 4 left piston, 5 right piston, 6 intermediate sealing strip, 7 annular channel, 8 third communication channel, 9 first protrusion, 10 first limiting groove, 11 stop block, 12 second limiting groove, 13 second protrusion, 14 U-shaped groove, 15 third protrusion, 16 third limiting groove. DETAILED DESCRIPTION

[0018] The implementation modes of the utility model are described below by specific embodiments, and other advantages and effects of the utility model can be easily understood by those skilled in the art from the content disclosed in the description.

[0019] It should be understood that, in the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the utility model product is used, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0020] In the description of the utility model, it should also be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0021] For example, Figures 1-4As shown, a high sealing oil cylinder with sealing leakage monitoring function, comprising a cylinder barrel 1, a piston rod 2 is arranged in the cylinder barrel 1, a partition plate 3 is arranged at the end of the piston rod 2, a left piston 4 and a right piston 5 are arranged on both sides of the partition plate 3, the left piston 1 and the right piston 5 are symmetrically placed, and a middle sealing strip 6 is arranged on the outer periphery of the partition plate 3; the piston rod 2 is provided with a first longitudinal channel 201 and a second longitudinal channel 202, a first radial communication channel 203 is arranged at the inner end of the first longitudinal channel 201 towards the outer surface of the piston rod, and a second radial communication channel 204 is arranged at the inner end of the second longitudinal channel 202 towards the outer surface of the piston rod 2; the piston rod 2 is symmetrically provided with a first piston rod annular groove 205 and a second piston rod annular groove 206 on the side close to the partition plate 3, the first communication channel 203 is communicated with the first piston rod annular groove 205, and the second communication channel 204 is communicated with the second piston rod annular groove 206; the left piston 4 and the right piston 5 are provided with an annular channel 7 on the periphery of the side close to the partition plate 3, a radial third communication channel 8 is arranged on the left piston 4 and the right piston 5 and communicated with the annular channel 7, and one end of the third communication channel 8 on the left piston 4 and the right piston 5 is respectively communicated with the first piston rod annular groove 205 and the second piston rod annular groove 206; when the piston sealing fails, high-pressure hydraulic oil can enter the annular channel through the leakage, and finally flow into the longitudinal channel, thereby providing a detection signal for the subsequent leakage monitoring device.

[0022] As shown in the figure, Figure 2 the first protrusion 9 is arranged on the inner diameter surface of the left piston 4 along both sides of the first communication channel 203, and the first protrusion 9 is arranged on the inner diameter surface of the right piston 5 along both sides of the third communication channel 8, the first limiting groove 10 is arranged on the side of the first piston rod annular groove 205 and the second piston rod annular groove 206, the first protrusion 9 is inserted into the first limiting groove 10; effectively limit the movement of the piston in the radial direction, prevent the piston from shifting or shaking under the action of hydraulic oil pressure, reduce the risk of sealing failure caused by piston displacement, and ensure the reliable sealing performance of the oil cylinder during operation.

[0023] As shown in the figure, Figure 3 the stop block 11 is arranged on the outer side of the left piston 4 and the right piston 5, the second limiting groove 12 is arranged at the junction of the stop block 11 and the piston rod 2, the second protrusion 13 is arranged on the outer side of the left piston 4 and the right piston 5, and the second protrusion 13 is limitedly matched with the second limiting groove 12; the matching structure on the inner side of the piston forms a double stable guarantee, ensures that the piston remains stable on the piston rod, keeps the piston sealing in a reliable state at all times, greatly improves the stability and reliability of the overall operation of the oil cylinder, and reduces the failure caused by loose piston.

[0024] As shown in the figure, Figure 4As shown, the spacer plate 3 is provided with U-shaped grooves 14 on the outer periphery symmetrically, the left piston 4 and the right piston 5 are provided with third protrusions 15 on the side of the spacer plate, the third protrusions 15 are inserted into the U-shaped grooves 14 in cooperation; the cooperation of the third protrusions and the third limiting grooves ensures the stability of the outer diameter surface of the inner end of the piston after installation, further enhances the stability of the piston after installation, plays a key role in improving the sealing performance of the oil cylinder, and ensures that the oil cylinder can still maintain good sealing effect under complex working conditions.

[0025] As shown in the drawings, Figure 4 As shown, the spacer plate 3 is provided with two groups of third limiting grooves 16 on the outer circumferential surface symmetrically, the middle sealing strip 6 is inserted into the third limiting grooves in cooperation; the stability of the middle sealing strip after installation is ensured, and the left piston and the right piston form a triple seal.

[0026] The working principle of the utility model is described as follows: monitoring devices are arranged in the first longitudinal channel and the second longitudinal channel, and the monitoring devices can be pressure sensors or color indicators observation ports. When the piston seal leaks, the hydraulic oil on the high-pressure side will enter the annular channel through the leakage, and then flow into the longitudinal channel, and then be detected by the monitoring device.

[0027] The above-described embodiments are merely preferred embodiments of the utility model, and do not limit the concept and scope of the utility model. Various modifications and improvements to the technical solutions of the utility model made by those skilled in the art without departing from the design concept of the utility model shall fall within the protection scope of the utility model, and the technical content claimed by the utility model has been fully recorded in the claims.

Claims

1. A high-sealing hydraulic cylinder with sealing leakage monitoring function, comprising a cylinder barrel, characterized in that, The cylinder contains a piston rod, with a spacer plate at the end of the piston rod. A left piston and a right piston are located on either side of the spacer plate, symmetrically placed. A central sealing strip is located on the outer periphery of the spacer plate. The piston rod contains a first longitudinal channel and a second longitudinal channel. The inner end of the first longitudinal channel has a radial first connecting channel extending to the outer surface of the piston rod, and the inner end of the second longitudinal channel has a radial second connecting channel extending to the outer surface of the piston rod. A first piston rod annular groove and a second piston rod annular groove are symmetrically located on the side of the piston rod near the spacer plate. The first connecting channel communicates with the first piston rod annular groove, and the second connecting channel communicates with the second piston rod annular groove. The left and right pistons have annular channels on their outer periphery near the spacer plate. A radial third connecting channel on the left and right pistons communicates with the annular channels, with one end of the third connecting channel on the left and right pistons respectively communicating with the first and second piston rod annular grooves.

2. A high-sealing hydraulic cylinder with sealing leakage monitoring function according to claim 1, characterized in that, The inner diameter surface of the left piston is provided with first protrusions along both sides of the first connecting channel, and the inner diameter surface of the right piston is provided with first protrusions along both sides of the third connecting channel. The annular groove of the first piston rod and the annular groove of the second piston rod are recessed inward to provide first limiting grooves, and the first protrusions and the first limiting grooves are engaged.

3. A high-sealing hydraulic cylinder with sealing leakage monitoring function according to claim 1, characterized in that, The left and right pistons are provided with a stop block on their outer side. A second limiting groove is provided at the junction of the stop block and the piston rod. The left and right pistons are provided with a second protrusion on their outer side. The second protrusion is matched with the second limiting groove for limiting.

4. A high-sealing hydraulic cylinder with sealing leakage monitoring function according to claim 1, characterized in that, The spacer plate is symmetrically provided with U-shaped grooves on its periphery, and the left and right pistons are provided with a third protrusion on the side of the spacer plate, which is inserted into the U-shaped groove.

5. A high-sealing hydraulic cylinder with sealing leakage monitoring function according to claim 1, characterized in that, Two sets of third limiting grooves are symmetrically provided on the outer circumference of the partition plate, and the middle sealing strip is inserted into the third limiting groove.

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