CN220979395U

CN220979395U - Joint assembly and down-the-hole hammer

Info

Publication number: CN220979395U
Application number: CN202322903786.5U
Authority: CN
Inventors: 杨日平; 朱自佳; 杨湘龙
Original assignee: Changsha Heijingang Industrial Co Ltd
Current assignee: Changsha Heijingang Industrial Co Ltd
Priority date: 2023-10-27
Filing date: 2023-10-27
Publication date: 2024-05-17
Anticipated expiration: 2033-10-27

Abstract

The application discloses a joint assembly and a down-the-hole hammer, comprising: the connector body is internally provided with a high-pressure air passage, and the high-pressure air passage extends along the axial direction of the connector body; the air outlet is arranged on the outer circumferential surface of the joint body, and the air outlet is communicated with the high-pressure air channel through an air outlet channel; the fixed suit is in the outside of joint body, be used for opening and closing the elastic component of gas outlet, the elastic component has first state and second state, when the elastic component is in first state, the elastic component the internal surface with there is the clearance of ventilating between the surface of joint body, when the elastic component is in the second state, the elastic component the internal surface with laminating between the surface of joint body. Compared with the prior art, the joint assembly and the down-the-hole impactor provided by the application have the advantages that the structure is simple, the non-return valve spring is not required to be arranged, the sealing performance is better, and the slag return in the impactor can be better prevented.

Description

Joint assembly and down-the-hole hammer

Technical Field

The application relates to the technical field of drilling equipment, in particular to a joint assembly and a down-the-hole hammer.

Background

The pneumatic down-the-hole hammer uses high-pressure air as a power source to drive a piston in the hammer to reciprocate at high speed and high frequency, so that the piston obtains enough energy to impact a drill bit to perform drilling operation. The impact force acts on the drill bit in the form of stress wave, and huge impact energy is generated in extremely short time, so that the rock can be effectively broken, the hole can be quickly formed, and the purpose of drilling the rock can be achieved.

Currently, a down-the-hole hammer often comprises a joint and a check valve assembly, wherein a high-pressure air passage is arranged on the joint, the check valve is used for opening and closing the high-pressure air passage, and the high-pressure air rushes open the check valve to enter the down-the-hole hammer to drive a piston to reciprocate so as to provide pulse acting force for a hammer bit. When the high-pressure gas in the high-pressure air passage stops, the check valve returns to the initial position, so that the condition of slag return in the impactor is prevented.

In the prior art, the movement of the check valve mainly depends on the high-pressure gas and the pressure applied by the check valve spring, and the check valve spring is easy to wear, rust and corrode in the use process, so that the check valve spring is invalid and the effect of preventing slag from returning inside the impactor is poor.

Therefore, there is a need for a joint assembly and a down-the-hole impactor that are simple in structure, do not require a non-return valve spring, have better sealing properties, and can better prevent slag from returning inside the impactor.

Disclosure of utility model

In order to solve the technical problems, the application provides the joint assembly and the down-the-hole impactor, which have simple structure, do not need to be provided with a check valve spring, have better sealing performance and can better prevent slag from returning inside the impactor.

The technical scheme provided by the application is as follows:

A joint assembly, comprising:

The connector body is internally provided with a high-pressure air passage, and the high-pressure air passage extends along the axial direction of the connector body;

The air outlet is arranged on the outer circumferential surface of the joint body, and the air outlet is communicated with the high-pressure air channel through an air outlet channel;

The fixed suit is in the outside of joint body, be used for opening and closing the elastic component of gas outlet, the elastic component has first state and second state, when the elastic component is in first state, the elastic component the internal surface with there is the clearance of ventilating between the surface of joint body, when the elastic component is in the second state, the elastic component the internal surface with laminating between the surface of joint body.

Preferably, the elastic member is capable of generating elastic deformation so that the elastic member is switched from the second state to the first state, and the elastic member is capable of generating elastic reset deformation so that the elastic member is switched from the first state to the second state.

Preferably, the elastic member includes:

The plugging section is sleeved on the outer side of the air outlet, the length of the plugging section is larger than the diameter of the air outlet, and the outer diameter of the plugging section is gradually reduced along the extending direction of the air outlet channel.

Preferably, the elastic member further includes:

The locating section that links to each other with the biggest end of shutoff section, the internal surface of locating section is provided with the location step, the surface of joint body be provided with the constant head tank that the cooperation of location step was used, the location step embedding in the constant head tank, so that the elastic component with the joint body is fixed.

Preferably, the elastic piece is in interference fit with the joint body.

Preferably, the inner diameter of the positioning step is not larger than the outer diameter of the positioning groove, and the inner diameter of the plugging section is smaller than the outer diameter of the joint body attached to the plugging section.

Preferably, the elastic member is made of a polyurethane material.

Preferably, the air outlet channel is obliquely arranged, and an oblique angle is formed between the axis of the air outlet channel and the axis of the high-pressure air channel, and the oblique angle is particularly 10 degrees to 80 degrees.

A down-the-hole impactor comprising the joint assembly of any preceding claim.

According to the connector assembly provided by the utility model, the connector body and the elastic piece are arranged at first, the high-pressure air channel is arranged in the connector body, the high-pressure air channel extends along the axial direction of the connector body, the rear end of the connector body is connected with the drill rod, the inner pipe of the drill rod is communicated with the high-pressure air channel and is used for providing high-pressure air to the high-pressure air channel, the outer circumferential surface of the connector body is provided with the air outlet, the air outlet is communicated with the high-pressure air channel through the air outlet channel, the elastic piece is fixedly sleeved on the outer side of the connector body, the elastic piece is used for opening and closing the air outlet, the elastic piece is in a first state and in a second state, a ventilation gap is reserved between the inner surface of the elastic piece and the outer surface of the connector body when the elastic piece is in the first state, the high-pressure air enters the inside of the impactor through the high-pressure air channel, the air outlet and the ventilation gap, and when the elastic piece is in the second state, the inner surface of the elastic piece is attached to the outer surface of the connector body, and the condition that slag returning inside the impactor can be prevented. Therefore, compared with the prior art, the connector assembly provided by the embodiment of the utility model has the advantages that the structure is simpler, the check valve spring does not need to be arranged, the air outlet is opened and closed through the deformation of the elastic part, and compared with the check valve spring, the connector assembly has better sealing performance and can better prevent the slag from returning inside the impactor.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a first construction of a joint assembly according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a second configuration of a joint assembly according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of FIG. 2 at A;

FIG. 4 is a schematic structural view of an elastic member according to an embodiment of the present utility model;

Fig. 5 is a schematic structural view of an inner cylinder according to an embodiment of the present utility model.

Reference numerals: 1. a high pressure airway; 2. a joint body; 3. an air outlet channel; 4. an elastic member; 41. plugging the section; 42. a positioning section; 43. positioning the step; 44. a positioning groove; 5. an outer cylinder; 6. an inner cylinder; 7. a piston; 8. a gas distribution assembly; 9. and a joint sleeve.

Detailed Description

In order to enable those skilled in the art to better understand the technical solutions of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the application to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the application, are included in the spirit and scope of the application which is otherwise, without departing from the spirit or scope thereof.

The embodiment of the utility model is written in a progressive manner.

As shown in fig. 1 to 4, an embodiment of the present utility model provides a joint assembly including: the connector body 2 is internally provided with a high-pressure air passage 1, and the high-pressure air passage 1 extends along the axial direction of the connector body 2; the air outlet is arranged on the outer circumferential surface of the joint body 2, and is communicated with the high-pressure air channel 1 through an air outlet channel; the fixed cover is adorned in the outside of connecting body 2 for open and close the elastic component 4 of gas outlet, elastic component 4 has first state and second state, when elastic component 4 is in first state, has the clearance of ventilating between the surface of elastic component 4 and the surface of connecting body 2, when elastic component 4 is in the second state, laminating between the surface of elastic component 4 and the surface of connecting body 2.

In the prior art, the movement of the check valve mainly depends on high-pressure gas and the pressure applied by the check valve spring, on one hand, in order to avoid the deviation of the direction of the check valve spring when the check valve spring is deformed, a guide piece is often arranged on the check valve, and the check valve spring is easy to abrade with the guide piece when the check valve spring is deformed, so that the service life of the check valve is influenced; on the other hand, the check valve spring can contact water in the use process, so that the check valve spring is rusted, and furthermore, the phenomenon of electrochemical corrosion is easy to occur between mineral substances in water and the check valve spring, so that the check valve spring is easy to fail, and the internal slag return of the down-the-hole hammer cannot be effectively prevented.

According to the connector assembly provided by the utility model, firstly, the connector body 2 and the elastic piece 4 are arranged, the high-pressure air channel 1 is arranged in the connector body 2, the high-pressure air channel 1 extends along the axial direction of the connector body 2, the rear end of the connector body 2 is used for being connected with a drill rod, the inner pipe of the drill rod is communicated with the high-pressure air channel 1 and is used for providing high-pressure air into the high-pressure air channel 1, the outer circumferential surface of the connector body 2 is provided with the air outlet, the air outlet is communicated with the high-pressure air channel 1 through the air outlet channel 3, the elastic piece 4 is fixedly sleeved on the outer side of the connector body 2, the elastic piece 4 is used for opening and closing the air outlet, the elastic piece 4 has a first state and a second state, when the elastic piece 4 is in the first state, a ventilation gap exists between the inner surface of the elastic piece 4 and the outer surface of the connector body 2, the high-pressure air enters the inside of the impactor through the high-pressure air channel 1, the air outlet and the ventilation gap, and when the elastic piece 4 is in the second state, the condition that slag returning inside the impactor can be prevented. Therefore, compared with the prior art, the connector assembly provided by the embodiment of the utility model has the advantages that the structure is simpler, the check valve spring does not need to be arranged, the air outlet is opened and closed through the deformation of the elastic piece 4, and compared with the check valve spring, the connector assembly has better sealing performance and can better prevent the slag from returning in the impactor.

In the above-described structure, as one of the embodiments, the elastic member 4 in the embodiment of the present utility model can elastically deform, so that the elastic member 4 is switched from the second state to the first state, and the elastic member 4 can elastically return to deform, so that the elastic member 4 is switched from the first state to the second state.

Specifically, when the high-pressure gas is not introduced into the high-pressure gas passage 1, the elastic member 4 is in the second state, and when the high-pressure gas is introduced into the high-pressure gas passage 1, the elastic member 4 is elastically deformed under the action of the high-pressure gas, and is switched from the second state to the first state, a ventilation gap exists between the inner surface of the elastic member 4 and the outer surface of the joint body 2, and the high-pressure gas enters the inside of the down-the-hole hammer through the ventilation gap. After drilling is completed, high-pressure gas is stopped being input into the high-pressure air channel 1, the elastic piece 4 generates elastic reset deformation, the elastic piece 4 is switched to a second state from the first state, the outer surface of the elastic piece 4 is attached to the outer surface of the joint body 2, and the condition that slag returns to the down-the-hole impactor is prevented. The elastic piece 4 generates elastic deformation and elastic resetting deformation, and a check valve spring does not need to be additionally arranged, so that the structure is simpler, the sealing effect is better, and the failure condition is not easy to occur.

In the above structure, as one of the embodiments, in order to better enable the elastic member 4 to elastically deform, as a preferred embodiment, the elastic member 4 in the embodiment of the present utility model includes the blocking section 41, the blocking section 41 is sleeved on the outer side of the air outlet, and the outer diameter of the blocking section 41 is tapered along the extending direction of the air outlet channel 3, that is, the wall thickness of the blocking section 41 is tapered, so that the air pressure of the high-pressure air required for blowing the blocking section 41 is smaller.

In the above structure, as one of the embodiments, the elastic member 4 in the embodiment of the present utility model further includes the positioning section 42, where the positioning section 42 is connected to the section with the largest diameter of the plugging section 41, the positioning step 43 is disposed on the inner surface of the positioning section 42, the positioning groove 44 is disposed on the outer surface of the joint body 2, the positioning groove 44 is used in cooperation with the positioning step 43, and the positioning step 43 is embedded into the positioning groove 44, so that the elastic member 4 is fixed with the joint body 2.

Furthermore, in the embodiment of the present utility model, the elastic member 4 is in interference fit with the connector body 2, when no high-pressure gas is introduced into the high-pressure gas channel 1, the inner surface of the blocking section 41 is attached to the outer surface of the connector body 2, so that the sealing effect is good, when the high-pressure gas is introduced into the high-pressure gas channel 1, the high-pressure gas blows off the blocking section 41, a ventilation gap is formed between the inner surface of the blocking section 41 and the outer surface of the connector body 2, and the high-pressure gas enters the down-the-hole hammer from the ventilation gap.

More specifically, in the embodiment of the present utility model, the inner diameter of the positioning step 43 is not greater than the outer diameter of the positioning groove 44, the inner diameter of the plugging section 41 is smaller than the outer diameter of the outer circumferential surface of the joint body 2 attached to the plugging section 41, and the inner diameter of the elastic member 4 is expanded under the action of external force due to the elastic deformation of the elastic member 4, so that the positioning section 42 is embedded into the positioning groove 44, the elastic member 4 is elastically restored, and the inner surface of the plugging section 41 is tightly attached to the outer surface of the joint body 2, so that the sealing performance is better.

In the above structure, as one specific embodiment, the inner diameter of the positioning step in the embodiment of the present utility model is not greater than the outer diameter of the positioning groove, and the difference between the outer diameters of the positioning step and the positioning groove is 2mm to 16mm.

Further, as one of the embodiments, the elastic member 4 in the embodiment of the present utility model is specifically made of a polyurethane material or a rubber material. As a preferred implementation mode, the elastic piece in the embodiment of the utility model is preferably made of polyurethane material, and the polyurethane material has excellent high-temperature resistance, oil resistance and corrosion resistance and can be better suitable for the service environment of the down-the-hole hammer.

In the above structure, as one of the embodiments, at least two air outlets are provided, and the elastic member 4 is sleeved outside the air outlets. The air outlets are opened and closed through the elastic piece 4, the structure is simple, at least two air outlets are arranged, the phenomenon that high-pressure air can only be discharged from a single air outlet is avoided, and the pressure intensity of the high-pressure air on the elastic piece 4 is overlarge.

Further, at least two air outlets are provided in the embodiment of the present utility model, and the air outlets are circumferentially spaced around the joint body 2.

In the above-described structure, as the first embodiment, the axis of the air outlet passage 3 in the example of the present utility model may be arranged perpendicular to the axis of the high-pressure passage, but in this embodiment, the fluidity of the high-pressure gas is poor, and the high-pressure gas in the air outlet passage 3 is perpendicular to the inner surface of the elastic member 4, so that the air pressure required for elastically deforming the elastic member 4 is large.

As a second embodiment, the air outlet channel 3 in the embodiment of the present utility model is obliquely arranged, and an oblique angle is formed between the axis of the air outlet channel 3 and the axis of the high-pressure air channel 1, and the oblique angle is specifically 10 ° to 80 °. Through setting up the slope of air outlet channel 3, the mobility of high-pressure gas is better, pushes away the elastic component more easily, and the high-pressure gas acts on the surface area on the elastic component 4 is bigger, makes more easily to have the clearance of ventilating between the surface of elastic component 4 and joint body 2, and is low to the requirement of the atmospheric pressure of high-pressure gas.

The utility model also provides a down-the-hole hammer, which comprises any one of the joint components, and compared with the down-the-hole hammer in the prior art, the down-the-hole hammer does not need to be provided with a check valve spring, and the air outlet is opened and closed through the deformation of the elastic piece 4, so that the down-the-hole hammer has simpler structure, better sealing performance and better capability of preventing slag from returning inside the hammer.

More specifically, the down-the-hole hammer provided by the embodiment of the utility model further comprises an outer cylinder 5, an inner cylinder 6, a gas distribution assembly 8 and a piston 7, wherein the outer cylinder 5 is sleeved on the outer side of the joint assembly, the outer cylinder 5 is fixedly connected with the joint assembly, the inner cylinder 6 is fixedly sleeved inside the outer cylinder 5, the piston 7 is movably sleeved inside the inner cylinder 6, the gas distribution assembly 8 is fixedly connected with the joint assembly, a high-pressure gas cavity is formed among the gas distribution assembly 8, the joint assembly and the inner cylinder 6, and when the elastic piece 4 is in a first state, the high-pressure gas channel 1 in the joint body 2 is communicated with the high-pressure gas cavity.

Further, as shown in fig. 5, the outer surface of the inner cylinder 6 in the embodiment of the present utility model is provided with air passing grooves 61 at intervals, the air passing grooves 61 are specifically in a spiral structure, the air passing grooves 61 extend to the front end surface of the inner cylinder 6 along the axial direction of the inner cylinder 6, at least three air passing grooves 61 are provided, and the air passing grooves 61 are provided at intervals around the outer circumferential surface of the inner cylinder 6.

Further, the inner cylinder 6 of the present utility model is further provided with an intake port 64, and the intake port 64 is provided corresponding to the air passing groove 61.

Further, the inner surface of the outer cylinder 5 in the embodiment of the present utility model is provided with a first limiting surface, and the outer surface of the inner cylinder 6 is provided with a second limiting surface 62 that cooperates with the first limiting surface.

Further, in the embodiment of the present utility model, the outer side of the joint body 2 is sleeved with the joint sleeve 9, the outer surface of the joint sleeve 9 is matched with the shape of the inner surface of the inner cylinder 6, the outer diameter of the joint sleeve 9 is gradually reduced, and the inner diameter of the inner cylinder 6 is gradually reduced along the direction from the joint body 2 to the inner cylinder 6.

Further, an opening 63 is formed on the inner surface of the inner cylinder 6 matching with the joint cover 9 in the embodiment of the present utility model, the opening 63 extends along the axial direction of the inner cylinder 6, the inner cylinder 6 is sleeved on the joint cover 9, and the opening 63 on the inner cylinder 6 is expanded, so that the inner cylinder 6 can be better fixed.

Further, the openings 63 and the air inlets 64 are arranged in one-to-one correspondence, and the openings 63 and the air inlets 64 are communicated.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A joint assembly, comprising:

A joint body (2) with a high-pressure air passage (1) arranged therein, wherein the high-pressure air passage (1) extends along the axial direction of the joint body (2);

The air outlet is arranged on the outer circumferential surface of the joint body (2), and is communicated with the high-pressure air channel (1) through an air outlet channel (3);

The fixed suit is in the outside of joint body (2), be used for opening and closing elastic component (4) of gas outlet, elastic component (4) have first state and second state, work as elastic component (4) are in when first state, have the clearance of ventilating between the internal surface of elastic component (4) with the surface of joint body (2), work as when elastic component (4) are in the second state, the internal surface of elastic component (4) with laminating between the surface of joint body (2).

2. The joint assembly according to claim 1, wherein,

The elastic piece (4) can generate elastic deformation so that the elastic piece (4) is switched from the second state to the first state, and the elastic piece (4) can generate elastic reset deformation so that the elastic piece (4) is switched from the first state to the second state.

3. The joint assembly according to claim 2, wherein,

The elastic member (4) includes:

the sealing section (41) is sleeved on the outer side of the air outlet, the length of the sealing section (41) is larger than the diameter of the air outlet, and the outer diameter of the sealing section (41) is gradually reduced along the extending direction of the high-pressure air channel (1).

4. The joint assembly according to claim 3, wherein,

The elastic member (4) further comprises:

The positioning section (42) is connected with the maximum end of the plugging section (41), a positioning step (43) is arranged on the inner surface of the positioning section (42), a positioning groove (44) matched with the positioning step (43) is arranged on the outer surface of the joint body (2), and the positioning step (43) is embedded into the positioning groove (44) so that the elastic piece (4) is fixed with the joint body (2).

5. The joint assembly according to claim 4, wherein,

The elastic piece (4) is in interference fit with the joint body (2).

6. The connector assembly of claim 5, wherein the connector assembly comprises,

The inner diameter of the positioning step (43) is not larger than the outer diameter of the positioning groove (44), and the inner diameter of the plugging section (41) is smaller than the outer diameter of the joint body attached to the plugging section.

7. The joint assembly according to any one of claims 1 to 6, wherein,

The elastic piece (4) is made of polyurethane material or rubber material.

8. The joint assembly according to claim 7, wherein,

The air outlet channel (3) is obliquely arranged, an inclination angle is formed between the axis of the air outlet channel (3) and the axis of the high-pressure air channel (1), and the inclination angle is specifically 10-80 degrees.

9. A down-the-hole impactor comprising the joint assembly of any one of claims 1 to 8.