A hydraulic cylinder system adapted to low temperature environment

Abstract

The utility model discloses a hydraulic oil cylinder system adapted to low temperature environment, which relates to the technical field and comprises a cylinder body with a cylinder cavity; a piston rod which moves through the cylinder cavity is arranged in the cylinder body, and the piston rod can conduct heat; a heating rod is fixed in the piston rod and its rod end is arranged along the rod end direction of the piston rod, and the exposed path position of the piston rod is provided with heating by the heating rod; a heating layer is fixedly arranged outside the cylinder body, and the heat generated by the heating layer is conducted to the cylinder cavity by the cylinder body; a temperature measuring component for detecting the temperature in the cylinder cavity is arranged outside the cylinder body; the utility model has the advantages that by arranging the heating rod and the heating layer, heating in different directions and for different parts can be carried out, thereby improving the comprehensiveness of heating, and when the piston rod is extended, the cylinder body can also be heated well, and it is easy to use; at the same time, a temperature measuring component is arranged outside the cylinder body to detect the temperature in the cylinder cavity, which is easy to understand and conducive to temperature control.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, and more specifically to a hydraulic oil cylinder system adapting to low temperature environments. Background Art

[0002] Hydraulic cylinders are widely used in various mechanical equipment and systems, mainly used to provide power for linear reciprocating motion. The structure generally includes cylinder barrel, piston and piston rod, oil hole, oil pipe, sealing device, buffer device, etc.

[0003] In low temperature applications, hydraulic cylinders may be used in the following situations:

[0004] Polar scientific research equipment: such as polar research vehicles, ice and snow operation machinery, etc. When conducting scientific research or engineering operations in extremely cold regions such as Antarctica and the Arctic, the hydraulic cylinder needs to be able to work normally in low temperature environments;

[0005] Low-temperature storage logistics equipment: Some special warehouses such as cold storage and freezer doors may use hydraulic cylinders for opening and closing devices. The temperature in this environment is relatively low.

[0006] Oil and gas industry: During the exploitation of oil and gas fields in cold and high-latitude areas, some wellhead equipment and pipeline laying equipment may also be equipped with hydraulic cylinders that can operate normally at low temperatures, etc.;

[0007] When using the hydraulic cylinder in a low temperature environment, although hydraulic oil with low temperature characteristics can be selected, the viscosity of the hydraulic oil will still increase significantly in a lower temperature environment, resulting in poor fluidity. The existing hydraulic cylinder (such as application number: CN202021131559.5, a heating type cylinder) adopts "heating of the first heating rod and the second heating rod to heat the cylinder" to increase the temperature of the hydraulic oil, but the piston rod of the hydraulic cylinder needs to be retracted and exposed. When exposed, the piston rod cannot be well heated in the hydraulic cylinder and needs to be retracted and then heated. There are the disadvantages of low heating comprehensiveness and difficulty in use; and it is not easy to understand the temperature of the hydraulic cylinder, and it is not convenient to control the temperature. Utility Model Content

[0008] The purpose of the utility model is to solve the above technical problems and provide a hydraulic cylinder system suitable for low temperature environment.

[0009] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0010] The utility model proposes a hydraulic cylinder system adapted to low temperature environment, comprising:

[0011] a cylinder body having a cylinder cavity;

[0012] A piston rod is provided in the cylinder body and moves through the cylinder cavity. The piston rod can conduct heat.

[0013] A heating rod is fixed inside the piston rod and the rod end is arranged along the rod end direction of the piston rod, and the exposed path position of the piston rod is provided with heating rod for heating;

[0014] A heating layer is fixedly attached to the cylinder body, and the heat generated by the heating layer is transferred from the cylinder body to the cylinder cavity;

[0015] A temperature measuring component for detecting the temperature in the cylinder cavity is arranged outside the cylinder body.

[0016] As a preferred technical solution of the utility model, the temperature measuring component is located between the cylinder body and the heating layer.

[0017] As a preferred technical solution of the utility model, the temperature measuring component includes a cavity formed between the cylinder body and the heating layer, a temperature sensor fixed to the cylinder body is arranged in the cavity, and the sensing end of the temperature sensor is fixed outside the cylinder body and penetrates into the cylinder cavity;

[0018] A piston fixed to the periphery of the piston rod is fitted in the cylinder cavity, and the path of the piston does not pass through the sensing end of the temperature sensor.

[0019] As a preferred technical solution of the utility model, a heat-insulating layer is bonded and fixed to the outer side of the heating layer.

[0020] As a preferred technical solution of the utility model, the piston divides the cylinder cavity into a first oil cavity and a second oil cavity, and the first oil cavity and the second oil cavity are respectively connected to the sensing end of the temperature sensor.

[0021] As a preferred technical solution of the utility model, the outer side of the cylinder body is respectively provided with oil ports communicating with the first oil chamber and the second oil chamber, and an oil pipe is fixedly connected to the outside of the oil ports.

[0022] As a preferred technical solution of the utility model, the oil pipe is wrapped by the heating layer in a non-contact manner.

[0023] As a preferred technical solution of the utility model, the piston rod is provided with a strip cavity which is only connected to the second oil cavity.

[0024] The beneficial effects of the utility model are as follows:

[0025] A heating rod 11 is arranged inside the piston rod 2 and its rod end is arranged along the rod end direction of the piston rod, and a heating layer 8 is arranged outside the cylinder body 1. Heat generated by the heating layer 8 is conducted from the cylinder body 1 to the cylinder cavity, so that heating is performed in different directions and for different components, thereby improving the comprehensiveness of heating. When the piston rod 2 is extended, the cylinder body 1 can also be better heated, which is easy to use. At the same time, a temperature measuring component 10 is arranged outside the cylinder body 1 to detect the temperature in the cylinder cavity, which is easy to understand and conducive to temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model.

[0027] Figure numerals: cylinder body -1, piston rod -2, piston -3, first oil chamber -4, second oil chamber -5, oil port -6, oil pipe -7, heating layer -8, insulation layer -9, temperature measuring component -10, heating rod -11, strip cavity -12, cavity -101, temperature sensor -102. DETAILED DESCRIPTION

[0028] Embodiment 1:

[0029] like Figure 1 As shown, this embodiment proposes: a hydraulic cylinder system adapted to low temperature environment, comprising:

[0030] A cylinder body 1 having a cylinder cavity (the cylinder body 1 is a hydraulic cylinder body);

[0031] A piston rod 2 is provided in the cylinder body 1 and moves in and out of the cylinder cavity. The piston rod 2 can conduct heat (the piston rod 2 is a part of the cylinder body 1. As shown in the figure, it penetrates into the cylinder body 1 at the top end of the cylinder body 1 and moves up and down);

[0032] The piston rod 2 is provided with a heating rod 11 (the built-in heating rod 11 does not interfere with the use of the piston rod 2), (and as shown in the figure, an electric connection line is provided at the top of the heating rod 11 and passes through the upper end of the piston rod 2 to facilitate connection with an external power supply), and the rod end is arranged along the rod end direction of the piston rod (the rod end of the heating rod 11 is oriented up and down, which is the same as the rod end of the piston rod 2, and the heating rod 11 can be arranged in a larger range inside the piston rod 2);

[0033] The exposed travel position of the piston rod 2 is provided with heating rods 11 for heating (i.e., when the piston rod 2 moves up and down, the same part exposed outside the cylinder body 1 and recovered inside the cylinder body 1 is distributed with the heating part of the heating rod 11, i.e., the length of the heating part of the heating rod 11 is not less than the moving length of the piston rod 2);

[0034] A heating layer 8 (the heating layer 8 can be a heating plate, etc.) is fixedly attached to the outside of the cylinder body 1, and the heat generated by the heating layer 8 is transferred from the cylinder body 1 to the cylinder cavity (as shown in the figure, an electrical connection line is provided on the heating layer 8 to connect to an external power source, and the heating layer 8 is energized to generate heat, and the outer side of the cylinder body 1 is heated to transfer heat to the cylinder cavity; the cylinder body 1 is made of a heat-conducting material, such as stainless steel, aluminum alloy, etc.);

[0035] A temperature measuring component 10 is provided outside the cylinder body 1 for detecting the temperature in the cylinder cavity, so as to directly and quickly know the temperature in the cylinder cavity;

[0036] It also includes a controller (which can be a PLC controller, not shown in the figure) to connect to an external power supply. The controller is electrically connected to the electrical components of the heating rod 11, the heating layer 8 and the temperature measuring component 10 to control the opening and closing of the heat generating components, which is more suitable for use in low temperature environments.

[0037] Embodiment 2:

[0038] like Figure 1 As shown, the difference from Example 1 is that: it also includes that the temperature measuring component 10 is located between the cylinder body 1 and the heating layer 8 (the temperature measuring component 10 is placed in the thermal insulation space to improve the detection accuracy).

[0039] In order to implement the above-mentioned temperature measuring component 10, it is proposed that Figure 1 As shown, the specific structure and composition of the temperature measuring component 10 can be as follows: the temperature measuring component 10 includes a cavity 101 formed between the cylinder body 1 and the heating layer 8 (as shown in the figure, the heating layer 8 is arched outside the cylinder body 1 to form a space);

[0040] A temperature sensor 102 fixed to the cylinder body 1 is provided in the cavity 101, and the sensing end of the temperature sensor 102 is fixed outside the cylinder body 1 and penetrates into the cylinder cavity (as shown in the figure, the temperature sensor 102 is electrically connected to the above-mentioned controller, and the sensing end of the temperature sensor 102 detects the temperature in the cylinder cavity);

[0041] A piston 3 fixed to the periphery of the piston rod 2 is fitted in the cylinder cavity, and the movement of the piston 3 does not pass through the sensing end of the temperature sensor 102 (that is, the piston 3 moves in fit to the inner wall of the cylinder cavity, and the moving part does not touch the sensing end of the temperature sensor 102, which is convenient for setting the sensing end of the temperature sensor 102 and will not affect the sealing of the piston 3 during displacement).

[0042] like Figure 1 As shown, a thermal insulation layer 9 is bonded and fixed (may be fixed by bonding or other methods) on the outside of the heating layer 8 (the thermal insulation layer 9 may be provided with multiple layers and the layers are bonded and integrated; the thermal insulation layer 9 is made of a material with low thermal conductivity, such as polyurethane foam, etc., to improve heat loss and increase thermal insulation).

[0043] The piston 3 divides the cylinder cavity into a first oil cavity 4 and a second oil cavity 5, and the first oil cavity 4 and the second oil cavity 5 are respectively connected to the sensing end of the temperature sensor 102 (as shown in the figure, the piston 3 divides the cylinder cavity into a first oil cavity 4 and a second oil cavity 5 up and down, and a group of temperature measuring components 10 are respectively set for the first oil cavity 4 and the second oil cavity 5 to measure the temperature of the space respectively, so as to improve the detection accuracy).

[0044] The cylinder body 1 is provided with oil ports 6 communicating with the first oil chamber 4 and the second oil chamber 5 on the outside thereof, and an oil pipe 7 is fixedly connected to the outside of the oil port 6 (the oil pipe 7 is connected to an external oil working device, such as an oil tank or the like).

[0045] The oil pipe 7 is wrapped by the heating layer 8 in a non-contact manner, which can also provide thermal insulation and heat preservation effect on the oil pipe 7, making it more suitable for use in low temperature environments.

[0046] Embodiment 3:

[0047] like Figure 1 As shown, the difference between it and Example 2 is that: it also includes that the piston rod 2 is provided with a strip cavity 12 which is only connected to the second oil chamber 5 (as shown in the figure, a strip-shaped empty groove is extended up and down at the bottom of the piston rod 2, and is connected to the second oil chamber 5, that is, the oil in the second oil chamber 5 can flow into the strip cavity 12, and the temperature in the first oil chamber 4, the heating rod 11, and the piston rod 2 can be better conducted to each other, reducing the temperature difference between the first oil chamber 4 and the second oil chamber 5, and facilitating the joint temperature adjustment), which is more suitable for use in low temperature environments.

[0048] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0049] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A hydraulic cylinder system adapted to low temperature environment, comprising: A cylinder body (1) having a cylinder cavity; A piston rod (2) is provided in the cylinder body (1) and moves through the cylinder cavity. The piston rod (2) can conduct heat. It is characterized in that A heating rod (11) is fixedly arranged in the piston rod (2) and the rod end is arranged along the rod end direction of the piston rod, and the heating rod (11) is provided at each exposed path position of the piston rod (2) for heating; A heat supply layer (8) is fixedly attached to the outside of the cylinder body (1), and the heat generated by the heat supply layer (8) is conducted to the cylinder cavity by the cylinder body (1); A temperature measuring component (10) for detecting the temperature in the cylinder cavity is arranged outside the cylinder body (1).

2. A hydraulic cylinder system adapted to low temperature environment according to claim 1, characterized in that: The temperature measuring component (10) is located between the cylinder body (1) and the heating layer (8).

3. A hydraulic cylinder system adapted to low temperature environment according to claim 2, characterized in that: The temperature measuring component (10) comprises a cavity (101) formed between the cylinder body (1) and the heating layer (8), a temperature sensor (102) fixed to the cylinder body (1) is arranged in the cavity (101), and a sensing end of the temperature sensor (102) is fixed outside the cylinder body (1) and penetrates into the cylinder cavity; A piston (3) fixed to the periphery of the piston rod (2) is fitted in the cylinder cavity, and the path of the piston (3) does not pass through the sensing end of the temperature sensor (102).

4. The hydraulic cylinder system adapted to low temperature environment according to claim 1, characterized in that: A heat-insulating layer (9) is bonded and fixed to the outer side of the heating layer (8).

5. The hydraulic cylinder system adapted to low temperature environment according to claim 3, characterized in that: The piston (3) divides the cylinder cavity into a first oil cavity (4) and a second oil cavity (5), and the first oil cavity (4) and the second oil cavity (5) are respectively connected to the sensing end of the temperature sensor (102).

6. The hydraulic cylinder system adapted to low temperature environment according to claim 5, characterized in that: The outer side of the cylinder body (1) is provided with oil ports (6) respectively connected with the first oil chamber (4) and the second oil chamber (5), and an oil pipe (7) is fixedly connected to the outside of the oil port (6).

7. The hydraulic cylinder system adapted to low temperature environment according to claim 6, characterized in that: The oil pipe (7) is wrapped by the heating layer (8) in a non-contact manner.

8. The hydraulic cylinder system adapted to low temperature environment according to claim 5, characterized in that: The piston rod (2) is provided with a strip cavity (12) which is connected only to the second oil cavity (5).

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