CN108087584A - A kind of fluid reversing structure and gas-liquid impactor mechanism - Google Patents

Abstract

The invention discloses a fluid reversing structure and a gas-liquid impact mechanism, and relates to the technical field of fluid transmission. The fluid reversing structure includes a base cylinder, a seal, a piston rod body and a control valve body. The piston rod body is slidably disposed in the stroke cavity along the direction from the first end to the second end. The control valve body is slidably disposed in the control cavity along the direction from the first end to the second end. The control valve body slides in the control cavity and has a conduction control cavity, so that the intake channel enters the pressure application space through the control cavity, communicates with the first pressure application port and the natural state of the exhaust channel and the control channel, and cuts off the control space. The chamber cuts off the air intake channel from the pressurizing space, and the exhaust channel from the control channel, so that the air intake channel passes through the control cavity and enters a compressed state where the control channel communicates with the second pressure application port. The reversing structure is simple in structure and does not need to be provided with an external reversing mechanism or double inlet and outlet oil circuits.

Description

A fluid reversing structure and gas-liquid impact mechanism

technical field

The invention relates to the technical field of fluid transmission, in particular to a fluid reversing structure and a gas-liquid impact mechanism.

Background technique

Impactor, a basic equipment that needs to be used in drilling engineering, is generally divided into two types:

Hydraulic hammer, also known as hydraulic impact rotary drilling tool, hydraulic down-the-hole hammer, hydraulic hammer. Drilling flushing fluid and hydraulic oil are used as the power medium, and the power tool at the bottom of the hole generates continuous impact load by using the energy of high-pressure fluid flow and dynamic water hammer energy. It is usually directly connected to the upper part of the drilling tool, and while rotating and drilling, the continuous impact load is transmitted to the drill bit, so that the drill bit can combine the rock breaking in two ways: rotary cutting and impact. It is used in geological drilling and engineering construction, and is especially suitable for application in hard, broken rock formations and medium-hard coarse-grained heterogeneous rock formations.

Pneumatic impactor, also known as pneumatic impactor, pneumatic down-the-hole hammer. With compressed air as the power medium, the energy of compressed air is used to generate continuous impact load power tools at the bottom of the hole. Compressed air can also be used as a hole washing medium. Pneumatic impactors are divided into high wind pressure and low wind pressure, valve type and valveless type. Usually, the pneumatic impactor is directly connected with the cemented carbide column tooth drill bit to break the rock in the impact mode, and the low-speed rotation does not take the core for comprehensive drilling. It is mainly used in fields such as hydrological water well drilling, coreless geological drilling, geological disaster prevention engineering, and mine rock drilling. The characteristics of the existing impactor: (1) pressure work, spring return, (2) pressure return, spring force work, (3) pressure return, the impact force is generated by the falling of the piston's own weight, (4) the external reversing mechanism, the defect : (1) The impact force is small, and the impact force is largely offset by the reverse force. (2) The impact stroke is long, the energy consumption is high, and the overall size is large. (3) The external reversing mechanism is large in size and complex in structure. Cannot be used as a bottom hole drill. (4) The self-weight impact force of the piston is small and the efficiency is low.

Contents of the invention

The first object of the present invention is to provide a fluid reversing structure, which is applied in the fields of drilling and engineering. , can effectively save energy.

The second object of the present invention is to provide a gas-liquid impact mechanism. The gas-liquid impact mechanism has the above-mentioned fluid reversing structure, which can effectively save energy. losses and operate efficiently.

Embodiments of the present invention are achieved like this:

A fluid reversing structure, comprising:

The base cylinder, the base cylinder has opposite first end and second end, the inside of the base cylinder has a stroke cavity, the first end has an air inlet connected to the stroke cavity, and the second end has an exhaust port connected to the stroke cavity ;

a seal positioned within the stroke cavity between the first end and the second end;

Piston rod body, the piston rod body has a pressure end and an output end, the outer peripheral wall of the piston rod body is in sealing contact with the seal, the inside of the piston rod body has a control cavity and a control channel, and the piston rod body can slide along the direction from the first end to the second end is arranged in the stroke cavity, the outer peripheral wall of the piston rod body, the base cylinder and the seal jointly define the intake channel and the exhaust channel, and the pressure applying end and the first end jointly define the pressure applying space,

The air intake passage communicates with the pressurized space from the air inlet through the control cavity, the exhaust passage leads from the exhaust port to the control passage through the control cavity, and the pressure application end has a first pressure application port that communicates with the control cavity. A pressure application port is located in the intake passage, the output end has a second pressure application port connected to the control cavity, and the second pressure application port is located in the exhaust passage;

a control valve body, the control valve body is slidably arranged in the control cavity along the direction from the first end to the second end;

The control valve body slides in the control cavity with:

Conducting the control cavity so that the intake channel enters the pressure application space through the control cavity to communicate with the first pressure application port and the natural state that the exhaust channel and the control channel are connected;

Cutting off the control cavity cuts off the air intake passage from the pressure application space, and cuts off the exhaust passage from the control passage, so that the intake passage enters the compression state where the control passage is connected to the second pressure application port through the control cavity;

When the control valve body is in the natural state, the air pressure in the intake passage acts on the pressure-applying end, making the piston rod move in the direction from the first end to the second end. The air pressure in the air channel acts on the control valve body through the first pressure port, so that the control valve body changes from the natural state to the compressed state;

When the control valve body is in the compressed state, the air pressure in the intake passage acts on the control valve body through the second pressure port, so that the control valve body is converted from the compressed state to the natural state and pushes the piston rod along the Movement in the direction of the second end to the first end.

The inventor designed the above-mentioned fluid reversing structure, which is applied to drilling engineering. The fluid reversing structure is simple in structure and can effectively save energy, and the fluid reversing structure is applicable to two pressure transmission modes of air pressure and hydraulic pressure , specifically, the fluid reversing structure includes a base cylinder, a seal, a piston rod body and a control valve body, wherein the control valve body is slidably arranged in the control cavity of the piston rod body, and the piston rod body is slidably arranged in the base cylinder In the stroke cavity, the outer peripheral wall of the piston rod body, the base cylinder and the sealing member jointly define an intake channel and an exhaust channel, and the pressure applying end of the piston rod body has a distance from the first end and jointly define a pressure applying space. The intake channel communicates with the intake port and communicates with the pressurized space through the control cavity, and the exhaust channel communicates with the exhaust port and leads to the control channel of the piston rod body through the control cavity. Discharging hydraulic pressure or air pressure into the air inlet can make the hydraulic pressure or air pressure push the pressure application end, so that the piston rod moves along the direction from the first end to the second end. In order to make the piston rod reciprocate and ensure the singleness of the driving energy, that is, only use hydraulic pressure or air pressure, a control valve body is set. When the piston rod body goes down to the maximum position and touches the second end, the hydraulic pressure or air pressure acts on the control valve body , so that the control valve body changes from the natural state to cut off the control cavity, so that the intake channel is cut off from the pressure application space, and the exhaust channel is cut off from the control channel, so that the intake channel enters the control channel through the control cavity and connects with the second pressure application port. In the pressing state, continue to provide hydraulic pressure or air pressure, and the hydraulic pressure or air pressure acts on the control valve body through the second pressure port, so that the control valve body slides in the direction from the second end to the first end, and it leads to the control air from the pressing state. The cavity makes the intake channel enter the pressure application space through the control cavity to communicate with the first pressure application port and the natural state that the exhaust channel and the control channel are connected, and through the further sliding of the control valve body, the piston rod body is pushed along the second end to the first Move in the direction of one end and return to the initial position. By providing hydraulic pressure or air pressure to make the piston rod body slide in cooperation with the control valve body, the piston rod body can reciprocate under the action of a single energy source to complete the drilling operation. The fluid reversing structure is simple in structure, does not need an external reversing mechanism and two-way gas or liquid supply, does not need to be provided with double inlet and outlet oil circuits, and can effectively save energy.

In one embodiment of the invention:

The two ends of the control valve body in the direction from the first end to the second end are respectively connected to the pressure application end and the output end through the first elastic member and the second elastic member;

There are gaps between the opposite ends of the control valve body and the first pressure application port and the second pressure application port;

The control valve body is in a natural state under the joint action of the first elastic member and the second elastic member.

In one embodiment of the invention:

The first elastic member is a spring, and the second elastic member is a spring.

In one embodiment of the invention:

a valve body control cover, the valve body control cover is located in the control cavity, and the valve body control cover has opposite connecting ends and abutting ends;

The opposite ends of the first elastic member are respectively connected with the control valve body and the connection end;

The abutting end is configured to abut against and close the first pressure application port and pass through the first pressure application port to abut against the first end, so that there is a gap between the piston rod body and the first end.

In one embodiment of the invention:

The outer peripheral wall of the piston rod body is sequentially provided with a first through hole, a second through hole, a third through hole and a fourth through hole through the control cavity along the direction from the first end to the second end;

The first through hole communicates with the air intake channel and the pressurizing space, the second through hole communicates with the air intake channel and the exhaust channel, the third through hole communicates with the air intake channel and the control channel, and the fourth through hole communicates with the control channel and the exhaust channel;

When the control valve body is in a natural state, the control valve body leads to the first through hole, blocks the second through hole, blocks the third through hole and leads to the fourth through hole;

When the control valve body is in a pressing state, the control valve body blocks the first through hole, conducts the second through hole, conducts the third through hole and blocks the fourth through hole.

In one embodiment of the invention:

The outer peripheral wall of the control valve body is sequentially provided with a first annular groove, a second annular groove, a third annular groove and a fourth annular groove along the direction from the first end to the second end;

The first annular groove is used for conducting the first through hole, the second annular groove is used for conducting the second through hole, the third annular groove is used for conducting the third through hole, and the fourth annular groove is used for conducting the fourth through hole. hole.

In one embodiment of the invention:

The air inlet is an arc-shaped hole opened at the first end.

In one embodiment of the invention:

The sealing element is a sealing ring.

In one embodiment of the invention:

The exhaust port is a plurality of arc-shaped holes arranged at intervals around the center of the second end.

A gas-liquid impact mechanism, the gas-liquid impact mechanism has an impact head and any one of the above-mentioned fluid reversing structures;

The air inlet is configured to communicate with a pressure pump that delivers pressure to the air inlet;

The impact head runs through the second end and is connected with the output end.

The technical solution of the present invention has at least the following beneficial effects:

The invention provides a fluid reversing structure, which is applied in the field of drilling and engineering. energy.

The invention provides a gas-liquid impact mechanism. The gas-liquid impact mechanism has the above-mentioned fluid reversing structure, can effectively save energy, does not need an external energy storage mechanism to generate impact force by gas-liquid pressure in both directions, has no pressure loss and operates efficiently.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of the fluid reversing structure in Embodiment 1 of the present invention under a first viewing angle;

Fig. 2 is a schematic structural view of the fluid reversing structure in Embodiment 1 of the present invention under a second viewing angle;

3 is a schematic structural view of the fluid reversing structure in Embodiment 1 of the present invention under a third viewing angle;

Fig. 4 is a schematic structural view of the fluid reversing structure in Embodiment 1 of the present invention under a fourth viewing angle;

Fig. 5 is a schematic structural view of the fluid reversing structure in Embodiment 1 of the present invention under a fifth viewing angle;

Fig. 6 is an enlarged view of place VI in Fig. 4;

7 is a schematic structural diagram of the first end in Embodiment 1 of the present invention;

Fig. 8 is a schematic structural diagram of the second end in Embodiment 1 of the present invention.

Icons: 10-fluid reversing structure; 11-base cylinder; 12-seal; 13-piston rod body; 14-control valve body; 15-first elastic member; 16-second elastic member; 17-valve body control cover 21-first through hole; 22-second through hole; 23-third through hole; 24-fourth through hole; 31-first annular groove; 32-second annular groove; 34-the fourth annular groove; 61-the first pressure port; 62-the second pressure port; 70-pressure space; 81-intake passage; 82-exhaust passage; 91-intake port; 92-row Air port; 93-control channel; 130-pressure application end; 131-output end; 170-resistance end.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inner", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or the conventionally placed position when the product of the invention is used. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integral connection; it can be mechanical connection, direct connection, indirect connection through an intermediary, or internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature above or below the second feature may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact but is through additional feature contacts between them. Moreover, the first feature on, above and above the second feature includes the first feature directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature being below, below and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

Example 1

This embodiment provides a fluid reversing structure 10, which is applied to drilling engineering. The fluid reversing structure 10 has a simple structure and can effectively save energy.

Please refer to FIG. 1 , which shows the specific structure of the fluid reversing structure 10 in this embodiment at a first viewing angle.

The fluid reversing structure 10 is suitable for both pneumatic and hydraulic pressure transmission methods. Specifically, the fluid reversing structure 10 includes a base cylinder 11 , a seal 12 , a piston rod body 13 and a control valve body 14 .

The base cylinder 11 has an opposite first end and a second end. The interior of the base cylinder 11 has a stroke cavity, the first end has an air inlet 91 connected to the stroke cavity, and the second end has an exhaust port connected to the stroke cavity. 92.

A seal 12 is located within the stroke cavity between the first end and the second end. It should be noted that, in this embodiment, the sealing member 12 is a sealing ring installed in the stroke cavity.

The piston rod body 13 has a pressure end 130 and an output end 131. The outer peripheral wall of the piston rod body 13 is in sealing contact with the seal 12. The inside of the piston rod body 13 has a control cavity and a control channel 93. The piston rod body 13 extends from the first end to the second end. The direction of the end is slidably arranged in the stroke cavity, the outer peripheral wall of the piston rod body 13, the base cylinder 11 and the seal 12 jointly define the intake channel 81 and the exhaust channel 82, and the pressure applying end 130 and the first end jointly define the applying pressure end 130. pressure space 70, the intake channel 81 communicates with the intake port 91 and communicates with the pressure application space 70 through the control cavity, the exhaust channel 82 communicates with the exhaust port 92 and leads to the control channel 93 through the control cavity, and the pressure application end 130 There is a first pressure application port 61 connected to the control cavity, the first pressure application port 61 is located in the intake passage 81, the output end 131 has a second pressure application port 62 connected to the control cavity, the second pressure application port 62 is located in the control cavity Channel 93.

The control valve body 14 is slidably disposed in the control cavity along the direction from the first end to the second end.

The control valve body 14 by sliding in the control cavity has:

Conducting the control cavity makes the intake channel 81 enter the pressure application space 70 through the control cavity and communicate with the first pressure application port 61 and the natural state of the conduction between the exhaust channel 82 and the control channel 93. It should be explained that the natural state Refers to the state where the intake channel 81 enters the pressure application space 70 through the control cavity and communicates with the first pressure application port 61 , and the exhaust channel 82 communicates with the control channel 93 .

Cutting off the control cavity makes the intake passage 81 cut off from the pressurizing space 70 , and the exhaust passage 82 from the control passage 93 , so that the intake passage 81 enters a compressed state where the control passage 93 communicates with the second pressure opening 62 through the control cavity.

Please refer to FIG. 2, FIG. 3, FIG. 4 and FIG. 5 in conjunction with FIG. 1. FIG. 2 shows the specific structure of the fluid reversing structure 10 in this embodiment at a second viewing angle. FIG. The specific structure of the fluid reversing structure 10 under the third viewing angle, Fig. 4 shows the specific structure of the fluid reversing structure 10 in this embodiment under the fourth viewing angle, Fig. 5 shows the fluid reversing structure in this embodiment The specific structure of 10 in the fifth perspective, Fig. 1 to Fig. 5 show the schematic working flow of the fluid reversing structure 10 under the action of hydraulic pressure or air pressure in the non-working state. The direction of the arrow is the gas flow direction (or liquid flow direction). Among them, Fig. 1 shows that the fluid reversing structure 10 is in a non-working state, Fig. 2 shows the state when the piston rod body 13 descends to the maximum distance after pressurization, and Fig. 3 shows that the control valve body 14 completes the natural state to the compressed state to change the fluid reversing state. The state of access to each channel in the structure 10, Fig. 4 and Fig. 5 show the state when the control valve body 14 is pressed and pushes the piston rod body 13 upward to the non-working state.

When the control valve body 14 is in a natural state (as shown in Figure 1), the air pressure (or hydraulic pressure, hereinafter, the air pressure can also be replaced by hydraulic pressure) in the intake passage 81 acts on the pressure applying end 130, so that the piston rod body 13 moves along the first end to the second end (as shown in Figure 2), when the piston rod body 13 abuts against the second end, the air pressure (or hydraulic pressure) in the intake passage 81 acts on the control valve body through the first pressure port 61 14, so that the control valve body 14 is converted from a natural state to a compressed state (as shown in FIG. 3 ).

When the control valve body 14 is in the compressed state (as shown in Figure 3), the air pressure in the intake passage 81 acts on the control valve body 14 (as shown in Figure 4) through the second pressure port 62, so that the control valve body 14 is in the compressed state. Switch to the natural state and push the piston rod body 13 to move along the direction from the second end to the first end through the sliding of the control valve body 14 (as shown in FIG. 5 ).

Specifically, two ends of the control valve body 14 along the direction from the first end to the second end are respectively connected to the pressure applying end 130 and the output end 131 through the first elastic member 15 and the second elastic member 16 . There are gaps between the opposite ends of the control valve body 14 and the first pressure application port 61 and the second pressure application port 62 respectively, which is beneficial for the entry of gas or liquid. The control valve body 14 is in a natural state under the joint action of the first elastic member 15 and the second elastic member 16 . In this embodiment, the first elastic member 15 is a spring, and the second elastic member 16 is a spring.

Further, in order to ensure that the control valve body 14 can smoothly switch between the compressed state and the natural state under the condition of the smooth operation of the piston rod body 13, a valve body control cover 17 is also provided, please refer to Figure 6, which is the Enlarged view of point VI.

The valve body control cover 17 is located in the control cavity, and the valve body control cover 17 has opposite connecting ends and abutting ends 170 .

Two opposite ends of the first elastic member 15 are respectively connected with the control valve body 14 and the connection end.

The abutment end 170 is configured to abut against and close the first pressure application port 61 and abut against the first end through the first pressure application port 61, so that the piston rod body 13 has a gap with the first end, specifically, through the valve body The elastic abutment of the control cover 17 makes the air pressure push the valve body control cover 17 to act on the control valve body 14 after pushing the piston rod body 13. Lean on and support the pressure end 130 .

Specifically, please refer to FIG. 1 and FIG. 3 again.

A first through hole 21 , a second through hole 22 , a third through hole 23 and a fourth through hole 24 passing through the control cavity are sequentially provided on the outer peripheral wall of the piston rod body 13 along the direction from the first end to the second end.

The first through hole 21 communicates with the intake passage 81 and the pressurizing space 70, the second through hole 22 communicates with the intake passage 81 and the exhaust passage 82, the third through hole 23 communicates with the intake passage 81 and the control passage 93, and the fourth through hole 23 communicates with the intake passage 81 and the control passage 93. The hole 24 communicates with the control passage 93 and the exhaust passage 82 .

When the control valve body 14 is in a natural state, the control valve body 14 leads to the first through hole 21 , blocks the second through hole 22 , blocks the third through hole 23 and leads to the fourth through hole 24 .

When the control valve body 14 is in a pressing state, the control valve body 14 blocks the first through hole 21 , connects to the second through hole 22 , connects to the third through hole 23 and blocks the fourth through hole 24 .

A first annular groove 31 , a second annular groove 32 , a third annular groove 33 and a fourth annular groove 34 are sequentially provided on the outer peripheral wall of the control valve body 14 along the direction from the first end to the second end.

The first annular groove 31 is used for conducting the first through hole 21, the second annular groove 32 is used for conducting the second through hole 22, the third annular groove 33 is used for conducting the third through hole 23, and the fourth annular groove 34 Used to connect the fourth through hole 24 .

Please refer to FIG. 7 and FIG. 8 . FIG. 7 shows the specific structure of the end face of the first end in this embodiment. Fig. 8 is the specific structure of the end face of the second end in this embodiment.

The air inlet 91 is an arc-shaped hole opened at the first end. The exhaust port 92 is a plurality of arc-shaped holes arranged at intervals around the center of the second end.

The inventor has designed the above-mentioned fluid reversing structure 10, which is applied to drilling engineering. A pressure transmission mode, specifically, the fluid reversing structure 10 includes a base cylinder 11, a seal 12, a piston rod body 13, and a control valve body 14, wherein the control valve body 14 is slidably arranged in the control cavity of the piston rod body 13 , the piston rod body 13 is slidably arranged in the stroke cavity of the base cylinder 11, the outer peripheral wall of the piston rod body 13, the base cylinder 11 and the seal 12 jointly define the intake passage 81 and the exhaust passage 82, and the pressurization of the piston rod body 13 The end 130 has a distance from the first end and jointly defines the pressurization space 70 . The intake channel 81 communicates with the intake port 91 and communicates with the pressurized space 70 through the control cavity. The exhaust channel 82 communicates with the exhaust port 92 and leads to the control channel 93 of the piston rod body 13 through the control cavity. Discharging hydraulic pressure or air pressure into the air inlet 91 can make the hydraulic pressure or air pressure push the pressure applying end 130 so that the piston rod body 13 moves along the direction from the first end to the second end. In order to make the piston rod body 13 reciprocate and ensure the singleness of the driving energy, that is, only use hydraulic pressure or air pressure, a control valve body 14 is provided. When the piston rod body 13 descends to the maximum position against the second end, the hydraulic pressure or air pressure acts on the Control the valve body 14, so that the control valve body 14 changes from the natural state to cut off the control cavity, so that the intake passage 81 is cut off from the pressure application space 70, and the exhaust passage 82 is cut off from the control passage 93, so that the intake passage 81 passes through the control cavity Enter the pressure state where the control channel 93 communicates with the second pressure port 62, continue to provide hydraulic pressure or air pressure, and the hydraulic pressure or air pressure acts on the control valve body 14 through the second pressure port 62, so that the control valve body 14 moves toward the second end along the second end. Sliding in the direction of one end, it leads from the compressed state to the control cavity so that the intake passage 81 enters the pressure application space 70 through the control cavity to communicate with the first pressure application port 61 and the natural connection between the exhaust passage 82 and the control passage 93. state, and by controlling the further sliding of the valve body 14, the piston rod body 13 is pushed to move along the direction from the second end to the first end, and return to the initial position. By providing hydraulic pressure or air pressure to make the piston rod body 13 slide in conjunction with the control valve body 14, the piston rod body 13 can reciprocate under the action of a single energy source to complete the drilling operation. The fluid reversing structure 10 is simple in structure, does not need an external reversing mechanism and two-way gas or liquid supply, does not need to be provided with double inlet and outlet oil circuits, and can effectively save energy.

It should be noted that this embodiment also provides a gas-liquid impact mechanism, the gas-liquid impact mechanism has an impact head and the fluid reversing structure 10 provided above, the air inlet 91 is configured to communicate with the pressure pump, and the pressure pump is directed to The air inlet 91 delivers pressure, and the impact head passes through the second end and is connected to the output end 131 . The gas-liquid impact mechanism having the fluid reversing structure 10 can effectively save energy and operate efficiently. The gas-liquid impact mechanism does not require an external energy storage mechanism to generate impact force by gas-liquid pressure in two directions, without pressure loss, and the gas (liquid) consumption is lower than that of similar products, and the impact force is greater.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A fluid reversing structure, characterized in that, comprising: A base cylinder, the base cylinder has opposite first end and second end, the interior of the base cylinder has a stroke cavity, the first end has an air inlet communicating with the stroke cavity, the second The end has an exhaust port communicating with the stroke cavity; a seal located within the stroke cavity between the first end and the second end; A piston rod body, the piston rod body has a pressure-applying end and an output end, the outer peripheral wall of the piston rod body is in sealing contact with the sealing member, the inside of the piston rod body has a control cavity and a control channel, and the piston rod body has a control cavity and a control channel along the slidably arranged in the stroke cavity in the direction from the first end to the second end, the outer peripheral wall of the piston rod body, the base cylinder and the sealing member jointly define an intake channel and an exhaust channel , the pressure-applying end and the first end together define a pressure-applying space, the air intake passage communicates with the air inlet and communicates with the pressure-applying space through the control cavity, and the exhaust passage communicates The exhaust port is connected to the control channel through the control cavity, the pressure application end has a first pressure application port connected to the control cavity, and the first pressure application port is located at the inlet In the air channel, the output end has a second pressure port communicating with the control cavity, and the second pressure port is located in the control channel; a control valve body, the control valve body is slidably disposed in the control cavity along the direction from the first end to the second end; The control valve body slides within the control cavity to have: Conducting the control cavity so that the intake channel enters the pressure application space through the control cavity, communicates with the first pressure application port, and is in a natural state where the exhaust channel communicates with the control channel; The control cavity is cut off so that the intake passage is cut off from the pressurized space, and the exhaust passage is cut off from the control passage, so that the intake passage enters the control passage through the control cavity and communicates with the The compression state of the second pressure port; When the control valve body is in the natural state, the air pressure in the intake passage acts on the pressure applying end, so that the piston rod moves in the direction from the first end to the second end , when the piston rod body abuts against the second end, the air pressure in the air intake passage acts on the control valve body through the first pressure port, so that the control valve body is controlled by the transition from a natural state to said oppressive state; When the control valve body is in the compressed state, the air pressure in the air intake passage acts on the control valve body through the second pressure port, so that the control valve body changes from the compressed state to the The natural state is converted and the sliding of the control valve body pushes the piston rod body to move along the direction from the second end to the first end. 2. The fluid reversing structure according to claim 1, characterized in that: Both ends of the control valve body along the direction from the first end to the second end are respectively connected to the pressure applying end and the output end through a first elastic member and a second elastic member; There is a gap between the opposite ends of the control valve body and the first pressure application port and the second pressure application port; The control valve body is in the natural state under the joint action of the first elastic member and the second elastic member. 3. The fluid reversing structure according to claim 2, characterized in that: The first elastic member is a spring, and the second elastic member is a spring. 4. The fluid reversing structure according to claim 2, further comprising: a valve body control cover, the valve body control cover is located in the control cavity, and the valve body control cover has opposite connecting ends and abutting ends; The opposite ends of the first elastic member are respectively connected to the control valve body and the connection end; The abutting end is configured to abut against and close the first pressure application port and abut against the first end through the first pressure application port, so that the piston rod body and the first end have a gap. 5. The fluid reversing structure according to claim 1, characterized in that: The outer peripheral wall of the piston rod body is sequentially provided with a first through hole, a second through hole, a third through hole and a fourth through hole penetrating through the control cavity along the direction from the first end to the second end ; The first through hole communicates with the intake channel and the pressurizing space, the second through hole communicates with the intake channel and the exhaust channel, and the third through hole communicates with the intake channel and the control channel, the fourth through hole communicates with the control channel and the exhaust channel; When the control valve body is in the natural state, the control valve body conducts the first through hole, blocks the second through hole, blocks the third through hole and conducts the fourth through hole. hole; When the control valve body is in the pressing state, the control valve body blocks the first through hole, conducts the second through hole, conducts the third through hole, and blocks the fourth through hole. hole. 6. The fluid reversing structure according to claim 5, characterized in that: The outer peripheral wall of the control valve body is sequentially provided with a first annular groove, a second annular groove, a third annular groove and a fourth annular groove along the direction from the first end to the second end; The first annular groove is used for conducting the first through hole, the second annular groove is used for conducting the second through hole, and the third annular groove is used for conducting the third through hole , the fourth annular groove is used to communicate with the fourth through hole. 7. The commutation structure according to claim 1, characterized in that: The air inlet is an arc-shaped hole opened at the first end. 8. The fluid reversing structure according to claim 1, characterized in that: The sealing element is a sealing ring. 9. The fluid reversing structure according to claim 1, characterized in that: The exhaust port is a plurality of arc-shaped holes arranged at intervals around the center of the second end. 10. A gas-liquid impact mechanism, characterized in that: The gas-liquid impact mechanism has an impact head and the fluid reversing structure described in any one of claims 1-9; the air inlet is configured to communicate with a pressure pump that delivers pressure to the air inlet; The impact head passes through the second end and is connected to the output end.