Hydraulic cylinder for high speed and high temperature environment

Abstract

The application provides a hydraulic cylinder for high-speed high-temperature environment, comprising a hydraulic cylinder body, a telescopic rod arranged on the hydraulic cylinder body, the hydraulic cylinder body being arranged in a high-temperature working chamber, and the telescopic rod being slidably arranged out of the high-temperature working chamber; a high-speed buffer structure is arranged at the bottom end of the hydraulic cylinder body, the high-speed buffer structure is arranged out of the high-temperature working chamber and connected with a piston cylinder, one side of the piston cylinder is connected with a water supply assembly, the other side is connected with a water outlet assembly, the water outlet assembly is communicated with the high-temperature working chamber, and the high-temperature working chamber is further connected with an exhaust assembly; the high-temperature working chamber and the piston cylinder are arranged on a support. The hydraulic cylinder for high-speed high-temperature environment can make the existing hydraulic cylinder system adapt to high-speed high-temperature environment, the comprehensive effect of the high-speed buffer structure, the piston cylinder and the cooling system greatly enhances the working life of the hydraulic cylinder, and the hydraulic cylinder has the advantages of high high-temperature resistance, reliable working and good buffer performance.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder for high-speed and high-temperature environment. BACKGROUND

[0002] The movement speed of the high-speed hydraulic cylinder piston is very high, which will generate strong impact, collision and vibration at the end of the piston stroke, causing damage to the parts, and proper buffering brake must be carried out. At present, the buffering methods of the hydraulic cylinder mainly have two kinds: one is external buffering of the hydraulic cylinder, that is, a throttling control device is added in the control circuit of the hydraulic cylinder to carry out buffering by changing the throttling area; the other is internal buffering of the hydraulic cylinder, that is, a buffering structure is arranged in the hydraulic cylinder to carry out buffering, which has the advantages of simple structure, reliable work and good buffering performance.

[0003] In addition, with the continuous development of the metallurgical industry, the hydraulic cylinder is more and more widely used, and the working condition requires the hydraulic cylinder more and more. In some special working conditions, the environmental temperature is very high, so the high-temperature resistance of the hydraulic cylinder is extremely strict. For example, the ladle sliding nozzle cylinder, because of the close heat radiation of the tundish molten steel and the nozzle, the environmental temperature is as high as 400 DEG C. Therefore, the special working condition puts forward severe test to the performance of the hydraulic cylinder. Because of poor high-temperature resistance, the number of spare parts is large, and the production is often affected by frequent replacement.

[0004] Therefore, the present scheme tries to explore a hydraulic cylinder system which can adapt to high-speed and high-temperature environment in order to realize the technical effect of multifunction. SUMMARY

[0005] The purpose of the present application is to provide a hydraulic cylinder for high-speed and high-temperature environment, which solves the technical problem of how to make the existing hydraulic cylinder system adapt to high-speed and high-temperature environment. Through the comprehensive action of the high-speed buffering structure, the piston cylinder and the cooling system, the working life of the hydraulic cylinder is greatly enhanced, and the hydraulic cylinder has the advantages of strong high-temperature resistance, reliable work and good buffering performance.

[0006] A hydraulic cylinder for high-speed and high-temperature environment, comprising a hydraulic cylinder body, a telescopic rod is arranged on the hydraulic cylinder body, the hydraulic cylinder body is arranged in a high-temperature working chamber, and the telescopic rod can slide out of the high-temperature working chamber.

[0007] A high-speed buffering structure is arranged at the bottom end of the hydraulic cylinder body, the high-speed buffering structure penetrates out of the high-temperature working chamber and is connected with a piston cylinder, one side of the piston cylinder is connected with a water supply assembly, and the other side is connected with a water outlet assembly, the water outlet assembly is communicated with the high-temperature working chamber, and the high-temperature working chamber is also connected with an exhaust assembly.

[0008] The high-temperature working chamber and the piston cylinder are arranged on a support.

[0009] The high-speed cache structure comprises a plurality of guide columns connected at one end to the bottom end of the hydraulic cylinder body, spring two sleeved on the guide columns, and spring one sleeved on the telescopic rod, the other end of the guide column penetrating the high-temperature working chamber and being connected to the piston cylinder through a cooling structure;

[0010] One end of the spring one abuts against the hydraulic cylinder body, and the other end abuts against one inner end portion of the high-temperature working chamber.

[0011] One end of the spring two abuts against the hydraulic cylinder body, and the other end abuts against the other inner end portion of the high-temperature working chamber.

[0012] The water supply assembly comprises a water pump connected to the piston cylinder through a water pipe one, and a water supply tank connected to the water pump through a water pipe two, and the water pipe one is provided with a one-way valve one.

[0013] The water outlet assembly comprises a water pipe five having two ends connected to the piston cylinder and the high-temperature working chamber respectively, a cooling water tank connected to the water pipe five, and an evaporation box arranged inside the high-temperature working chamber, the end of the water pipe five is arranged above the evaporation box, and the water pipe five penetrates the cooling water tank.

[0014] The evaporation box has an annular structure, and an open slot is arranged at the upper end face, the inner side of the open slot is higher than the outer side, and the lower end of the hydraulic cylinder body is detachably in contact with the inner top end of the open slot.

[0015] The cooling structure comprises a cooling cylinder, a cylinder cover arranged at the top end of the cooling cylinder, a water pipe four and a water pipe six connected at one end to the cooling cylinder, the other end of the water pipe four being connected to the water pump, the other end of the water pipe six being connected to the cooling water tank, and the cooling water tank being connected to the water supply tank through a water pipe three.

[0016] The exhaust assembly comprises a suction pipe connected at one end to the high-temperature working chamber, a vacuum pump connected at the other end to the suction pipe, and an exhaust pipe connected to the vacuum pump, and the suction pipe penetrates the cooling water tank.

[0017] The top end of the piston cylinder is provided with a piston rod, and the outer end of the piston rod is connected to the cooling cylinder.

[0018] The present application achieves the following remarkable effects:

[0019] (1) This scheme combines the high-speed buffer structure with the cooling structure and the cooling water tank, and realizes the technical goal of cooling water entering the high-temperature working chamber through the movement of the hydraulic cylinder. In the high-temperature environment, the water evaporates and absorbs heat, and then the steam is discharged through the vacuum pump. Not only the effect of buffering the movement of the hydraulic cylinder is realized, but also the technical effect of cooling the high-temperature working chamber is realized. The innovation of this scheme is that the movement buffering of the hydraulic cylinder is combined with the drainage cooling process, which is ingenious and has the technical characteristics of multifunctionality.

[0020] (2) The evaporation box is in the form of a ring, and the upper end face is provided with an open slot, the inner side of which is higher than the outer side. The evaporation box not only can receive the cooling water from the water pipe five, but also can support the hydraulic cylinder.

[0021] (3) The cooling structure is provided, and since the guide column can slide out of the high-temperature working chamber, in order to avoid the damage of the high-temperature guide column to the piston rod, the cooling structure is provided to help cool the guide column.

[0022] In addition, since the cooling cylinder is connected with the water pump through the water pipe four, the cooling water in the cooling cylinder is in a state of constant updating, which ensures the cooling effect.

[0023] (4) The exhaust assembly is provided in this scheme, which has the following technical effects:

[0024] Firstly, the steam in the high-temperature working chamber is sucked and discharged by the vacuum pump, which balances the internal and external air pressure, avoids dangerous accidents, and increases the service life of the high-temperature working chamber and the hydraulic cylinder.

[0025] Secondly, after the steam in the high-temperature working chamber is discharged, the saturated gas pressure becomes non-saturated gas pressure. Since there is a certain amount of cooling water in the evaporation box, the non-saturated gas pressure helps to speed up the evaporation speed in the high-temperature environment, so that the temperature in the high-temperature working chamber is further reduced, and the service life of the hydraulic cylinder is prolonged.

[0026] Thirdly, under the action of the vacuum pump, since the high-temperature working chamber cannot be completely sealed, a negative pressure environment is formed in the high-temperature working chamber. When the hydraulic cylinder descends and abuts against the evaporation box, the piston rod descends and can easily extrude the water in the piston cylinder into the high-temperature working chamber, forming a positive feedback mechanism, which protects the piston cylinder and the high-temperature working chamber and prolongs their service life. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structure diagram of the hydraulic cylinder in the embodiment of the present application Figure 1 .

[0028] Figure 2 is a structure diagram of the hydraulic cylinder in the embodiment of the present application Figure 2.

[0029] Figure 3 It is the internal structure schematic view of high temperature working chamber in the embodiment of the application.

[0030] Figure 4 It is the structure schematic view of cooling system in the embodiment of the application.

[0031] Wherein, the reference signs are: 1, support; 2, piston cylinder; 3, water pipe one; 4, water pump; 5, water pipe two; 6, water supply tank; 7, water pipe three; 8, water pipe four; 10, piston rod; 11, cooling cylinder; 12, high temperature working chamber; 13, telescopic rod; 131, spring one; 132, body; 133, spring two; 134, guide column; 135, evaporation box; 136, cylinder cover; 14, air suction pipe; 15, water pipe five; 16, cooling water tank; 17, water pipe six; 18, vacuum pump; 19, exhaust pipe. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the technical features of the scheme, the following through specific embodiments, the scheme is described.

[0033] Referring to Figure 1 and Figure 2 A kind of hydraulic cylinder for high-speed high-temperature environment, including hydraulic cylinder body 132, telescopic rod 13 is provided on hydraulic cylinder body 132, hydraulic cylinder body 132 is arranged in high temperature working chamber 12, telescopic rod 13 can slide and pass out high temperature working chamber 12;

[0034] The bottom end of hydraulic cylinder body 132 is provided with high-speed buffer structure, high-speed buffer structure passes out high temperature working chamber 12, and is connected with piston cylinder 2, one side of piston cylinder 2 is connected with water supply assembly, and the other side is connected with water outlet assembly, water outlet assembly is communicated with high temperature working chamber 12, high temperature working chamber 12 is also connected with exhaust assembly;

[0035] High temperature working chamber 12 and piston cylinder 2 are all arranged on support 1.

[0036] Referring to Figure 3 High-speed buffer structure includes a plurality of guide columns 134 connected at the bottom end of hydraulic cylinder body 132, spring two 133 sleeved on guide column 134, spring one 131 sleeved on telescopic rod 13, another end of guide column 134 passes out high temperature working chamber 12 and is connected with piston cylinder 2 by cooling structure;

[0037] One end of spring one 131 abuts against hydraulic cylinder body 132, and the other end abuts against one inner end portion of high temperature working chamber 12;

[0038] One end of spring two 133 abuts against hydraulic cylinder body 132, and the other end abuts against the other inner end portion of high temperature working chamber 12.

[0039] The water supply assembly comprises a water pump 4 connected with the piston cylinder 2 through a water pipe 1, a water supply tank 6 connected with the water pump 4 through a water pipe 2, and a one-way valve 1 arranged on the water pipe 1.

[0040] The water outlet assembly comprises a water pipe 5 connected with the piston cylinder 2 and the high-temperature working chamber 12 at two ends, a cooling water tank 16 connected with the water pipe 5, and an evaporation box 135 arranged in the high-temperature working chamber 12, wherein the end of the water pipe 5 is arranged above the evaporation box 135, and the water pipe 5 passes through the cooling water tank 16.

[0041] The evaporation box 135 has a ring structure, and an open slot is arranged on the upper end face, the inner side of the open slot is higher than the outer side, and the lower end of the hydraulic cylinder body 132 is detachably in contact with the inner top end of the open slot.

[0042] Referring to Figure 4 The cooling structure comprises a cooling cylinder 11, a cylinder cover 136 arranged on the top end of the cooling cylinder 11, a water pipe 4 connected with the cooling cylinder 11 at one end, and a water pipe 6 connected with the cooling water tank 16 at the other end, wherein the other end of the water pipe 4 is connected with the water pump 4, the other end of the water pipe 6 is connected with the cooling water tank 16, and the cooling water tank 16 is connected with the water supply tank 6 through a water pipe 3.

[0043] The exhaust assembly comprises a suction pipe 14 connected with the high-temperature working chamber 12 at one end, a vacuum pump 18 connected with the other end of the suction pipe 14, and an exhaust pipe 19 connected with the vacuum pump 18, wherein the suction pipe 14 passes through the cooling water tank 16.

[0044] The top end of the piston cylinder 2 is provided with a piston rod 10, and the outer end of the piston rod 10 is connected with the cooling cylinder 11.

[0045] The specific working process of the present application is as follows:

[0046] According to the above description in the present scheme, the above device is prepared and installed.

[0047] When the hydraulic cylinder is running at high speed, there is a phenomenon of up and down vibration, and the high-speed buffering structure is arranged, that is, through the action of the spring 1 31 and the spring 2 133, the impact of the movement of the hydraulic cylinder on the high-temperature working chamber 12 can be avoided to the maximum extent.

[0048] When the hydraulic cylinder is lowered, the cooling cylinder 11 is pushed down by the guide column 134, and the cooling cylinder 11 pushes the piston rod 10 down. Since the water pipe one 3 and the water pipe five 15 are both provided with a one-way valve, at this time, the piston rod 10 will press the water in the piston cylinder 2 into the high-temperature working chamber 12 through the water pipe five 15, and into the evaporation box 135. Under the action of high temperature, a large amount of water evaporates, and the evaporation absorbs heat, which helps to cool the high-temperature working chamber 12. Subsequently, under the action of the vacuum pump 18, the steam in the high-temperature working chamber 12 is pumped out, realizing the effect of cooling the high-temperature working chamber 12.

[0049] When the hydraulic cylinder is raised, the cooling cylinder 11 and the piston rod 10 can be raised in the same way. Through the action of the controller, the water pump 4 is driven to operate, and the cooling water is introduced into the piston cylinder 2 through the water pipe one 3, to supplement the water in the piston cylinder 2.

[0050] More preferably, the water pipe one 3 can be directly connected with the water pipe two 5. In this way, when negative pressure is generated in the piston cylinder 2, the one-way valve one on the water pipe one 3 is opened, and the cooling water in the water tank directly enters the piston cylinder 2 under the action of negative pressure, realizing the water supplementing process.

[0051] The technical features not described in the application can be realized by or using the prior art, which will not be described here. Of course, the above description is not a limitation of the application, and the application is not limited to the above examples. Changes, modifications, additions or replacements made by ordinary skilled in the art within the scope of the application should also be within the protection scope of the application.

Claims

1. A hydraulic cylinder for high speed high temperature environment comprising a hydraulic cylinder body (132) having a telescopic rod (13) provided thereon, characterized in that, The hydraulic cylinder body (132) is arranged in the high-temperature working chamber (12), and the telescopic rod (13) is slidably arranged out of the high-temperature working chamber (12); The bottom end of the hydraulic cylinder body (132) is provided with a high-speed buffer structure, the high-speed buffer structure is arranged out of the high-temperature working chamber (12) and connected with the piston cylinder (2), one side of the piston cylinder (2) is connected with a water supply assembly, and the other side is connected with a water outlet assembly, the water outlet assembly is communicated with the high-temperature working chamber (12), and the high-temperature working chamber (12) is also connected with an exhaust assembly; The high-temperature working chamber (12) and the piston cylinder (2) are arranged on the support (1); The high-speed buffer structure comprises a plurality of guide columns (134) connected at one end of the bottom end of the hydraulic cylinder body (132), a spring (133) sleeved on the guide column (134), and a spring (131) sleeved on the telescopic rod (13), the other end of the guide column (134) is arranged out of the high-temperature working chamber (12) and connected with the piston cylinder (2) through a cooling structure; One end of the spring (131) abuts against the hydraulic cylinder body (132), and the other end abuts against one inner end of the high-temperature working chamber (12); One end of the spring (133) abuts against the hydraulic cylinder body (132), and the other end abuts against the other inner end of the high-temperature working chamber (12); The water supply assembly comprises a water pump (4) connected with the piston cylinder (2) through a water pipe (3), and a water supply tank (6) connected with the water pump (4) through a water pipe (5), and a one-way valve (1) is arranged on the water pipe (3); The water outlet assembly comprises a water pipe (15) connected with the piston cylinder (2) and the high-temperature working chamber (12) respectively, a cooling water tank (16) connected with the water pipe (15), and an evaporation box (135) arranged in the high-temperature working chamber (12), the end of the water pipe (15) is arranged above the evaporation box (135), and the water pipe (15) passes through the cooling water tank (16); The evaporation box (135) is in an annular structure, and an open groove is arranged on the upper end face, the inner side of the open groove is higher than the outer side, and the lower end of the hydraulic cylinder body (132) is detachably connected with the inner top end of the open groove; The cooling structure comprises a cooling cylinder (11), a cylinder cover (136) arranged at the top end of the cooling cylinder (11), a water pipe (8) and a water pipe (17) connected with the cooling cylinder (11) at one end, the other end of the water pipe (8) is connected with the water pump (4), the other end of the water pipe (17) is connected with the cooling water tank (16), and the cooling water tank (16) is connected with the water supply tank (6) through a water pipe (7); The exhaust assembly comprises an air suction pipe (14) connected with the high-temperature working chamber (12) at one end, a vacuum pump (18) connected with the other end of the air suction pipe (14), and an exhaust pipe (19) connected with the vacuum pump (18), and the air suction pipe (14) passes through the cooling water tank (16).

2. The high speed high temperature hydraulic cylinder of claim 1, wherein, The top end of the piston cylinder (2) is provided with a piston rod (10), the outer end of which is connected with the cooling cylinder (11).

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