Fluid cylinder pressure stabilizing device and tunnel working device

Abstract

The application provides a fluid cylinder pressure stabilizing device and a tunnel operation equipment. The fluid cylinder pressure stabilizing device comprises a fluid cylinder, a valve body, a valve core, a fluid pipe and an accumulator. The fluid cylinder has a first inner cavity. The valve body has a second inner cavity with a first opening, a second opening and a third opening. The valve core is movably arranged in the second inner cavity to divide the second inner cavity into a first cavity and a second cavity. The first opening is communicated with the first cavity. The second opening is communicated with the second cavity. The third opening is communicated with the first inner cavity. The first opening is communicated with the accumulator. The fluid pipe is communicated with the second opening. The fluid pipe is configured to introduce pressure gas into the second opening. The valve core has a communication cavity communicated with the fluid pipe. A first end of the communication cavity extends to one end of the valve core close to the second opening. A second end of the communication cavity extends to a side wall of the valve core. The application provides a fluid cylinder pressure stabilizing device and a tunnel operation equipment, which are simple in structure and small in size.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fluid cylinders, in particular to a fluid cylinder pressure stabilizing device and a tunnel operation equipment. BACKGROUND

[0002] A fluid cylinder is a fluid actuator that converts the pressure of a fluid into mechanical energy and performs linear reciprocating motion (or oscillating motion). Constant pressure output through a fluid cylinder can ensure smooth movement of the driven part, so how to achieve constant pressure output through a fluid cylinder is an important research topic in the field.

[0003] In the prior art, fluid cylinders are generally divided into hydraulic cylinders and pneumatic cylinders. For a hydraulic cylinder, in order to achieve constant pressure propulsion or retraction, the liquid is generally controlled at a constant pressure by a hydraulic pump and a valve group. A pneumatic cylinder uses a compressor to control the gas at a constant pressure, thereby achieving constant pressure propulsion or retraction of the pneumatic cylinder.

[0004] However, the existing fluid cylinder constant pressure output device has a complex structure and a large volume. SUMMARY

[0005] To solve at least one problem mentioned in the background art, the present application provides a fluid cylinder pressure stabilizing device and a tunnel operation equipment, which has a simple structure and a small volume.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] In a first aspect, the present application provides a fluid cylinder pressure stabilizing device, comprising a fluid cylinder, a valve body, a valve core, a fluid pipe and an accumulator;

[0008] The fluid cylinder has a first inner cavity, the valve body has a second inner cavity, the second inner cavity has a first opening, a second opening and a third opening, the first opening and the second opening are located at opposite ends of the valve body, and the third opening is located at a side of the valve body; the valve core is movably arranged in the second inner cavity to divide the second inner cavity into a first cavity and a second cavity, the first opening is in communication with the first cavity, the second opening is in communication with the second cavity, and the third opening is in communication with the first inner cavity;

[0009] The first opening is in communication with the accumulator, the fluid pipe is in communication with the second opening, and the fluid pipe is configured to introduce pressure gas into the second opening; the valve core has a communication cavity, the communication cavity is in communication with the fluid pipe, a first end of the communication cavity extends to one end of the valve core close to the second opening, and a second end of the communication cavity extends to a side wall of the valve core; the valve core is configured to move to a position where the second end of the communication cavity and the third opening are in communication under the pressure difference between the accumulator and the pressure gas, so that the pressure gas enters the first inner cavity through the communication cavity; or the valve core moves to a position where the third opening is blocked under the pressure difference, so as to isolate the fluid pipe and the first inner cavity.

[0010] As an optional implementation, the fluid pipe comprises a pressure-resistant pipe and a heating member, the pressure-resistant pipe has a third inner cavity in communication with the second opening, the communication cavity is in communication with the third inner cavity, and the third inner cavity is configured to add pressure gas; the heating member is arranged in the third inner cavity, and the heating member is used for heating the pressure gas to adjust the pressure of the third inner cavity.

[0011] As an optional implementation, the side wall of the valve core has a step, and the radial dimension of the end of the valve core towards the first opening is greater than the radial dimension of the end of the valve core towards the second opening; the inner wall of the second inner cavity is matched with the shape of the valve core.

[0012] As an optional implementation, the end of the valve core towards the second opening is provided with a communication hole extending in the axial direction of the valve core, the side wall of the valve core is provided with a communication groove in communication with the communication hole, and the communication groove and the communication hole jointly constitute the communication cavity; the valve core is configured to block the third opening by the end of the valve core towards the first opening through movement of the valve core, or to open the third opening by moving to a position opposite to the communication groove and the third opening.

[0013] As an optional implementation, the sealing sleeve is connected to the communication hole, and one end of the sealing sleeve away from the communication hole penetrates into the third inner cavity through the second opening.

[0014] As an optional implementation, the heating member comprises an electric heating rod arranged in the third inner cavity.

[0015] As an optional implementation, one side of the pressure-resistant pipe has a gas adding hole for adding pressure gas into the third inner cavity.

[0016] As an optional implementation, the valve body comprises a connecting head threadedly connected to one end of the valve body away from the pressure-resistant pipe, and the first opening is arranged in the connecting head.

[0017] As an optional implementation, the fluid cylinder comprises a piston and a cylinder body, the piston is movably connected to the cylinder body, and the piston and the cylinder body jointly enclose the first inner cavity.

[0018] In a second aspect, the application further provides a tunnel operation device comprising the fluid cylinder pressure stabilizing device of any one of the first aspect.

[0019] The fluid cylinder pressure stabilizing device provided by the application comprises a fluid cylinder, a valve body, a valve core, a fluid pipe and an accumulator; the fluid cylinder has a first inner cavity, the valve body has a second inner cavity, the second inner cavity has a first opening, a second opening and a third opening, the first opening and the second opening are located at opposite ends of the valve body, and the third opening is located at a side surface of the valve body; the valve core is movably arranged in the second inner cavity to divide the second inner cavity into a first cavity and a second cavity, the first opening is communicated with the first cavity, the second opening is communicated with the second cavity, and the third opening is communicated with the first inner cavity; the first opening is communicated with the accumulator, the fluid pipe is communicated with the second opening, and the fluid pipe is configured to introduce pressure gas into the second opening; the valve core has a communicating cavity, the communicating cavity is communicated with the fluid pipe, a first end of the communicating cavity extends to one end of the valve core close to the second opening, and a second end of the communicating cavity extends to a side wall of the valve core; the valve core is configured to move to a position where the second end of the communicating cavity is communicated with the third opening under the pressure difference between the accumulator and the pressure gas, so that the pressure gas enters the first inner cavity through the communicating cavity; or the valve core moves to a position where the third opening is blocked under the pressure difference, so as to isolate the fluid pipe and the first inner cavity.

[0020] The fluid cylinder pressure stabilizing device provided by the application can inject high-pressure gas into the fluid pipe and inject hydraulic oil into the first cavity during use, the high-pressure gas can push the valve core to the first cavity, so that the second end of the communicating cavity on the valve core is communicated with the third opening at the side surface of the valve body, in this way, the high-pressure gas in the fluid pipe can enter the third opening through the communicating cavity and then enter the first inner cavity, as the valve core continues to move to the first cavity, the opening of the communicating cavity communicated with the third opening becomes larger, the high-pressure gas entering the first inner cavity from the fluid pipe increases, and the pressure of the first inner cavity increases, when the pressure of the first inner cavity reaches a preset value, the hydraulic oil in the first cavity can be pressurized by the accumulator, so that the pushing force of the hydraulic oil on the valve core to the second cavity increases, when the pressure on both sides of the valve core is balanced, the pressure of the high-pressure gas input into the first inner cavity remains stable, and the constant pressure output of the fluid cylinder is ensured; it can be seen that the fluid cylinder pressure stabilizing device provided by the application has simple and compact structure, does not need to use devices such as hydraulic pumps and compressors, occupies small space and has low cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0022] Figure 1 The overall structure diagram of the fluid cylinder pressure stabilizing device provided by the embodiment of the present application;

[0023] Figure 2 A schematic view of a valve core in a fluid cylinder pressure stabilizing device according to an embodiment of the present application;

[0024] Figure 3 A cross-sectional view of the fluid cylinder pressure stabilizing device according to an embodiment of the present application. Figure 2

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 100 - fluid cylinder pressure stabilizing device

[0027] 110 - fluid cylinder

[0028] 111 - first inner cavity

[0029] 112 - cylinder body

[0030] 113 - piston

[0031] 120 - valve body

[0032] 121 - second inner cavity

[0033] 122 - connecting head

[0034] 130 - valve core

[0035] 131 - communication cavity

[0036] 1311 - communication hole

[0037] 1312 - communication groove

[0038] 140 - fluid pipe

[0039] 141 - pressure resistant pipe

[0040] 1411 - third inner cavity

[0041] 142 - heating element

[0042] 150 - energy accumulator

[0043] 160 - sealing sleeve DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0045] ​In the application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0046] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0047] In addition, the terms "mounting", "setting", "provided with", "connection", "connected" should be broadly understood. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0049] In the prior art, fluid cylinders are generally divided into hydraulic cylinders and pneumatic cylinders. For hydraulic cylinders, in order to achieve constant pressure propulsion or retraction of the hydraulic cylinder, the liquid is generally controlled at a constant pressure by a hydraulic pump, valve group. The pneumatic cylinder is to control the gas at a constant pressure by using a compressor, so as to realize the constant pressure propulsion or retraction of the pneumatic cylinder. However, the existing fluid cylinder constant pressure output device has a complex structure and a large volume.

[0050] In view of this, the present application provides a kind of fluid cylinder pressure stabilizing device, including fluid cylinder, valve body, valve core, fluid pipe and energy accumulator;Fluid cylinder has first inner cavity, valve body has second inner cavity, second inner cavity has first opening, second opening and third opening, first opening and second opening are located at the opposite ends of valve body, and third opening is located at the side of valve body;Valve core is movably arranged in second inner cavity, to separate second inner cavity into first cavity and second cavity, first opening is communicated with first cavity, second opening is communicated with second cavity, and third opening is communicated with first inner cavity;First opening and energy accumulator are communicated, fluid pipe and second opening are communicated, and fluid pipe is configured to pass into pressure gas into second opening;Valve core has communication cavity, communication cavity is communicated with fluid pipe, first end of communication cavity extends to one end of valve core close to second opening, and second end of communication cavity extends to the side wall of valve core.The present application provides fluid cylinder pressure stabilizing device Simple structure and compact, without using hydraulic pump, compressor and other devices, small space occupation, low cost.

[0051] Figure 1 The overall structure diagram of the fluid cylinder pressure stabilizing device provided by the embodiment of the present application is shown; Figure 2 The schematic diagram of the valve core in the fluid cylinder pressure stabilizing device provided by the embodiment of the present application is shown; Figure 3 The Figure 2 sectional view can be referred to Figures 1 to 3 The present application provides a kind of fluid cylinder pressure stabilizing device 100, including fluid cylinder 110, valve body 120, valve core 130, fluid pipe 140 and energy accumulator 150;Fluid cylinder 110 has first inner cavity 111, valve body 120 has second inner cavity 121, second inner cavity 121 has first opening, second opening and third opening, first opening and second opening are located at the opposite ends of valve body 120, and third opening is located at the side of valve body 120;Valve core 130 is movably arranged in second inner cavity 121, to separate second inner cavity 121 into first cavity and second cavity, first opening is communicated with first cavity, second opening is communicated with second cavity, and third opening is communicated with first inner cavity 111;First opening and energy accumulator 150 are communicated, fluid pipe 140 and second opening are communicated, and fluid pipe 140 is configured to pass into pressure gas into second opening;Valve core 130 has communication cavity 131, communication cavity 131 is communicated with fluid pipe 140, first end of communication cavity 131 extends to one end of valve core 130 close to second opening, and second end of communication cavity 131 extends to the side wall of valve core 130;Valve core 130 is configured to move to the position that second end of communication cavity 131 and third opening are communicated under the pressure difference of energy accumulator 150 and pressure gas, to make pressure gas enter first inner cavity 111 via communication cavity 131;Or valve core 130 moves to the position that third opening is blocked under the pressure difference, to isolate fluid pipe 140 and first inner cavity 111.

[0052] The fluid cylinder 110 can specifically include a piston 113 and a cylinder body 112, the piston 113 is movably connected with the cylinder body 112, and the piston 113 and the cylinder body 112 jointly enclose the first inner cavity 111.

[0053] The fluid cylinder pressure stabilizing device 100 can further include a controller and a pressure sensor, the pressure sensor and the accumulator 150 are electrically connected with the controller, the pressure sensor is arranged in the first inner cavity 111 and is used for detecting the air pressure of the first inner cavity 111 in real time and transmitting the detection result to the controller, and the controller controls the pressure inputted into the first cavity by the accumulator 150 according to the detected air pressure, so as to ensure the stability of the pressure in the first inner cavity 111.

[0054] When the fluid cylinder pressure stabilizing device 100 is used, high-pressure gas can be injected into the fluid pipe 140, and hydraulic oil can be injected into the first cavity, the high-pressure gas can push the valve core 130 to the direction of the first cavity, so that the second end of the communication cavity 131 on the valve core 130 is communicated with the third opening on the side surface of the valve body 120, in this way, the high-pressure gas in the fluid pipe 140 can enter the third opening through the communication cavity 131, and then enter the first inner cavity 111, as the valve core 130 continues to move to the direction of the first cavity, the opening of the communication between the communication cavity 131 and the third opening becomes larger, the high-pressure gas entering the first inner cavity 111 from the fluid pipe 140 increases, and the pressure of the first inner cavity 111 increases, when the pressure of the first inner cavity 111 reaches a preset value, the hydraulic oil in the first cavity can be pressurized by the accumulator 150, so that the pushing force of the hydraulic oil to the valve core 130 in the direction of the second cavity increases, when the pressure on both sides of the valve core 130 is balanced, the pressure of the high-pressure gas inputted into the first inner cavity 111 remains stable, and the constant pressure output of the fluid cylinder 110 is ensured. It can be seen that the fluid cylinder pressure stabilizing device 100 provided by the application has simple and compact structure, does not need to use devices such as hydraulic pumps and compressors, occupies small space and has low cost.

[0055] In the above embodiment, the fluid can include a pressure-resistant tube 141 and a heating member 142. The pressure-resistant tube 141 has a third inner cavity 1411 in communication with the second opening, and the communication cavity 131 is in communication with the third inner cavity 1411. The third inner cavity 1411 is configured to add pressure gas. The heating member 142 is arranged in the third inner cavity 1411. The heating member 142 is used to heat the pressure gas to adjust the pressure of the third inner cavity 1411. In this embodiment, a gas inlet hole can be arranged on one side of the pressure-resistant tube 141. The gas inlet hole is used to add gas to the third inner cavity 1411. Then, the heating member 142 in the third inner cavity 1411 is used to heat the gas in the cavity. After the gas is heated and expanded, high-pressure gas is formed. The high-pressure gas pushes the valve core 130 to move, so that the third inner cavity 1411 is in communication with the first inner cavity 111. Thus, the high-pressure gas in the third inner cavity 1411 can enter the first inner cavity 111. In this embodiment, the heating member 142 can include an electric heating rod. The electric heating rod is arranged in the third inner cavity 1411. The electric heating rod can be heated by being electrified from outside.

[0056] In the above embodiment, the side wall of the valve core 130 can have a step. The radial dimension of the end of the valve core 130 towards the first opening is greater than the radial dimension of the end of the valve core 130 towards the second opening. The shape of the inner wall of the second inner cavity 121 matches the shape of the valve core 130. In this embodiment, the valve core 130 can have a stepped shaft shape as a whole. The end with a larger diameter of the stepped shaft can face the first opening. During the movement of the valve core 130, the end with a larger diameter can block the third opening, so as to disconnect the communication between the third inner cavity 1411 and the first inner cavity 111. When the end with a smaller diameter of the valve core 130 moves to the third opening, the communication cavity 131 on the end with a smaller diameter can be in communication with the third opening. The high-pressure gas in the third inner cavity 1411 can enter the first inner cavity 111 through the communication cavity 131 and the third opening. The structure of the valve core 130 with one end larger and one end smaller can make the area of the side of the valve core 130 acted on by the high-pressure gas smaller than the area of the side of the valve core 130 acted on by the hydraulic oil. Thus, the pressure difference fluctuation caused by the high-pressure gas can be balanced by a small adjustment of the accumulator 150. It should be noted that during the movement of the valve core 130 in the second inner cavity 121, the side wall of the valve core 130 can keep in a sealed state with the inner wall of the second inner cavity 121. That is, the high-pressure gas in the third inner cavity 1411 can only enter the first inner cavity 111 through the communication cavity 131 on the valve core 130.

[0057] As Figure 2 and Figure 3As shown in the above embodiments, the end of the valve core 130 facing the second opening can be provided with a communication hole 1311 extending along the axial direction of the valve core 130, and the side wall of the valve core 130 is provided with a communication groove 1312 in communication with the communication hole 1311, and the communication groove 1312 and the communication hole 1311 jointly constitute a communication cavity 131; the valve core 130 is configured to block the end side wall of the valve core 130 facing the first opening to seal the third opening by moving itself, or to move to a position opposite to the communication groove 1312 and the third opening to open the third opening. It can be understood that the high-pressure gas in the third inner cavity 1411 can first enter the communication hole 1311, then enter the communication groove 1312 from the first communication hole 1311, and then enter the first inner cavity 111 through the third opening from the communication groove 1312.

[0058] In the above embodiments, a sealing sleeve 160 can also be included, the sealing sleeve 160 is connected to the communication hole 1311, and one end of the sealing sleeve 160 away from the communication hole 1311 penetrates into the third inner cavity 1411 through the second opening. The sealing sleeve 160 provided can ensure that the valve core 130 is in a sealed state with the second opening during movement, so that the high-pressure gas in the third inner cavity 1411 cannot act on the side of the valve core 130 close to the second opening, so that the acting area of the high-pressure gas on the valve core 130 is reduced, further facilitating the pressure adjustment of the accumulator 150.

[0059] In the above embodiments, the valve body 120 can include a connecting head 122, the connecting head 122 is threadedly connected to one end of the valve body 120 away from the pressure-resistant pipe 141, and the first opening is provided in the connecting head 122. Among them, the hydraulic oil can be injected into the first cavity through the first opening, and then the accumulator 150 is communicated with the first opening.

[0060] In the above embodiment, the liquid carbon dioxide injected into the third cavity can be added to the first cavity through the first opening, and then the accumulator 150 is communicated with the first opening, and the accumulator 150 is pressurized, the pressure of the accumulator 150 acts on the hydraulic oil, the hydraulic oil acts on one side of the spool 130, thereby pressing the spool 130 to the side close to the second opening, at this time, the spool 130 just blocks the third opening, then liquid carbon dioxide can be added to the third inner cavity 1411 of the pressure-resistant tube 141 through the gas inlet, and then the carbon dioxide can be heated by the electric heating rod to become high-pressure carbon dioxide gas, in the process of increasing the pressure of the carbon dioxide gas, the other side of the spool 130 is subjected to pressure, when the pressure of the high-pressure carbon dioxide gas on the spool 130 is greater than the pressure of the hydraulic oil on the spool 130, the spool 130 moves to the first opening direction, thereby gradually opening the third opening, so that the carbon dioxide gas can enter the first inner cavity 111 through the third opening, when the gas pressure of the carbon dioxide gas entering the first inner cavity 111 reaches a preset value, the accumulator 150 can be controlled to pressurize to maintain the current gas pressure of the first inner cavity 111, thereby realizing the constant pressure output of the fluid cylinder 110.

[0061] The fluid cylinder pressure stabilizing device 100 provided by the embodiment of the present application comprises a fluid cylinder 110, a valve body 120, a spool 130, a fluid pipe 140 and an accumulator 150; the fluid cylinder 110 has a first inner cavity 111, the valve body 120 has a second inner cavity 121, the second inner cavity 121 has a first opening, a second opening and a third opening, the first opening and the second opening are located at opposite ends of the valve body 120, and the third opening is located at the side of the valve body 120; the spool 130 is movably arranged in the second inner cavity 121 to divide the second inner cavity 121 into a first cavity and a second cavity, the first opening is communicated with the first cavity, the second opening is communicated with the second cavity, and the third opening is communicated with the first inner cavity 111; the first opening is communicated with the accumulator 150, the fluid pipe 140 is communicated with the second opening, and the fluid pipe 140 is configured to introduce pressure gas into the second opening; the spool 130 has a communication cavity 131, the communication cavity 131 is communicated with the fluid pipe 140, a first end of the communication cavity 131 extends to one end of the spool 130 close to the second opening, and a second end of the communication cavity 131 extends to the side wall of the spool 130; the spool 130 is configured to move to a position where the second end of the communication cavity 131 and the third opening are communicated under the pressure difference between the accumulator 150 and the pressure gas, so that the pressure gas enters the first inner cavity 111 through the communication cavity 131; or the spool 130 moves to a position where the third opening is blocked under the pressure difference, so as to isolate the fluid pipe 140 and the first inner cavity 111.

[0062] The fluid cylinder pressure stabilizing device 100 provided by the embodiment of the present application can inject high-pressure gas into the fluid pipe 140 and inject hydraulic oil into the first cavity when in use, the high-pressure gas can push the valve core 130 to the direction of the first cavity, so that the second end of the communication cavity 131 on the valve core 130 is in communication with the third opening on the side of the valve body 120, in this way, the high-pressure gas in the fluid pipe 140 can enter the third opening through the communication cavity 131, and then enter the first inner cavity 111, as the valve core 130 continues to move to the direction of the first cavity, the opening of the communication cavity 131 and the third opening becomes larger, the high-pressure gas entering the first inner cavity 111 from the fluid pipe 140 increases, and the pressure of the first inner cavity 111 increases, when the pressure of the first inner cavity 111 reaches a preset value, the hydraulic oil in the first cavity can be pressurized by the accumulator 150, so that the thrust of the hydraulic oil to the valve core 130 in the direction of the second cavity increases, when the pressure on both sides of the valve core 130 is balanced, the pressure of the high-pressure gas input into the first inner cavity 111 remains stable, and the constant pressure output of the fluid cylinder 110 is ensured. It can be seen that the fluid cylinder pressure stabilizing device 100 provided by the present application has simple and compact structure, does not need to use hydraulic pumps, compressors and other devices, occupies small space and has low cost.

[0063] In addition, the embodiment of the present application further provides a tunnel operation equipment, the tunnel operation equipment comprises the fluid cylinder pressure stabilizing device 100 in any one of the above embodiments. Since the fluid cylinder pressure stabilizing device 100 in the above embodiment is used as the drive of the tunnel operation equipment, the overall size and weight of the equipment can be reduced, and the construction efficiency of the equipment can be improved.

[0064] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fluid cylinder pressure stabilizing device, characterized in that, Includes fluid cylinder, valve body, valve core, fluid pipe, accumulator, and sealing sleeve; The fluid cylinder has a first inner cavity, and the valve body has a second inner cavity. The second inner cavity has a first opening, a second opening, and a third opening. The first opening and the second opening are located at opposite ends of the valve body, and the third opening is located on the side of the valve body. The valve core is movably disposed in the second inner cavity to divide the second inner cavity into a first cavity and a second cavity. The first opening communicates with the first cavity, the second opening communicates with the second cavity, and the third opening communicates with the first inner cavity. The first opening is connected to the accumulator, the fluid pipe is connected to the second opening, and the fluid pipe is configured to introduce pressurized gas into the second opening; the valve core has a communicating cavity connected to the fluid pipe, a first end of the communicating cavity extending to the end of the valve core near the second opening, and a second end of the communicating cavity extending to the sidewall of the valve core; the valve core is configured to move under the pressure difference between the accumulator and the pressurized gas to a position where the second end of the communicating cavity connects to the third opening, so that the pressurized gas enters the first inner cavity via the communicating cavity; or the valve core moves under the pressure difference to a position that blocks the third opening, so as to isolate the fluid pipe from the first inner cavity; The fluid tube includes a pressure-resistant tube and a heating element. The pressure-resistant tube has a third inner cavity communicating with the second opening. The communicating cavity is connected to the third inner cavity, and the third inner cavity is configured to introduce the pressurized gas. The heating element is disposed in the third inner cavity and is used to heat the pressurized gas to adjust the pressure of the third inner cavity. The valve core has a connecting hole extending axially along the valve core at the end facing the second opening. The valve core has a connecting groove communicating with the connecting hole on its sidewall. The connecting groove and the connecting hole together form the connecting cavity. The valve core is configured to block the third opening by moving its own sidewall at the end facing the first opening, or to move to a position opposite to the connecting groove and the third opening to open the third opening. The sealing sleeve is connected to the communicating hole, and the end of the sealing sleeve facing away from the communicating hole passes through the second opening into the third inner cavity. The sealing sleeve remains in a sealed state with the second opening when the valve core moves.

2. The fluid cylinder pressure stabilizing device according to claim 1, characterized in that, The valve core has a stepped sidewall, and the radial dimension of the end of the valve core facing the first opening is greater than the radial dimension of the end of the valve core facing the second opening; the inner wall shape of the second inner cavity matches the shape of the valve core.

3. The fluid cylinder pressure stabilizing device according to claim 2, characterized in that, The heating element includes an electric heating rod, which is disposed in the third inner cavity.

4. The fluid cylinder pressure stabilizing device according to claim 3, characterized in that, One side of the pressure-resistant tube has a gas filling hole, which is used to add the pressurized gas into the third inner cavity.

5. The fluid cylinder pressure stabilizing device according to claim 4, characterized in that, The valve body includes a connector threaded to one end of the valve body away from the pressure-resistant pipe, and the first opening is formed in the connector.

6. The fluid cylinder pressure stabilizing device according to claim 5, characterized in that, The fluid cylinder includes a piston and a cylinder body, the piston being movably connected to the cylinder body and together with the cylinder body forming the first inner cavity.

7. A tunnel working device, characterized in that, The tunneling equipment includes any one of the fluid cylinder pressure stabilizing devices according to claims 1-6.

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