CN-224214120-U - Heat dissipation type coal mine excavating drill bit

CN224214120UCN 224214120 UCN224214120 UCN 224214120UCN-224214120-U

Abstract

The utility model discloses a heat dissipation type coal mine excavating drill bit, which belongs to the technical field of drill bits and comprises a drill bit body, a plurality of cutting tooth bodies protruding from the drill bit body and extending from the side of the drill bit body to the head of the drill bit body, a plurality of cutting tooth heads embedded and fixed on the cutting tooth bodies, and a connecting end connected to the tail of the drill bit body, wherein a cooling cavity is formed in the drill bit body, an injection port communicated with the cooling cavity is formed in the center of the connecting end, and cooling liquid is filled into the cooling cavity through the injection port. Compared with the traditional drill bit, the heat dissipation type coal mine excavating drill bit adopts a double heat dissipation mode, namely, the outside is subjected to heat dissipation through air flow, and the inside is subjected to heat dissipation through cooling liquid absorption, so that the overall heat dissipation effect is greatly improved, the drill bit material (such as hard alloy) is prevented from being softened at high temperature, the cutting teeth are cracked or worn and aggravated, and the service life of the drill bit can be effectively prolonged.

Inventors

LIU YINZHAO
LIU KE
DING RUQING
Hua Xiubo
SUN YANCONG
LIU HONGXIAO
WU HAOTIAN
QU BIN

Assignees

兖矿能源集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250630

Claims (10)

1. A heat dissipation type coal mine excavating drill bit comprises a drill bit body, a plurality of cutting tooth bodies protruding out of the drill bit body and extending from the side of the drill bit body to the head of the drill bit body, a plurality of cutting tooth heads embedded and fixed on the cutting tooth bodies, and a connecting end connected to the tail of the drill bit body; The drill bit is characterized in that a cooling cavity is formed in the drill bit body, an injection port communicated with the cooling cavity is formed in the center of the connecting end, and cooling liquid is filled in the cooling cavity through the injection port.
2. The heat dissipation type coal mine mining drill bit of claim 1, wherein the drill bit body is provided with at least one heat dissipation pipe penetrating into the cooling cavity but not communicated with the cooling cavity, and two ends of the heat dissipation pipe are communicated with the outside.
3. The heat dissipation type coal mine mining drill bit of claim 2, wherein the two ends of the radiating pipe are respectively provided with a detachable sleeve provided with an opening, two rolling steel balls are arranged in the radiating pipe, and the steel balls cannot be separated from the radiating pipe after being blocked by the sleeves.
4. The heat dissipation type coal mine mining drill bit as set forth in claim 3, wherein a straight or cross-shaped slot is formed in the outer side of the blocking sleeve.
5. The heat dissipation type coal mine mining drill bit of claim 3, wherein a baffle for equally dividing the space in the heat dissipation pipe is arranged in the middle of the heat dissipation pipe, and the two steel balls are respectively positioned in the two spaces in the pipe.
6. The heat dissipating coal mine mining drill bit of claim 5, wherein the barrier is provided with heat dissipating holes for communicating the space in the pipe.
7. The heat dissipation type coal mine mining drill bit according to claim 1, wherein guide grooves are formed in the side face of the drill bit body, located between two adjacent cutting tooth bodies, and formed in parallel with the cutting tooth bodies.
8. A heat dissipating coal mine mining drill bit according to any one of claims 1-7, wherein the outer side of the connection end is provided with external threads for connection.
9. A heat dissipating coal mine mining drill bit according to any one of claims 1-7, wherein the outer side of the cutting tooth body is provided with a plurality of wear resistant protrusions in a linear array along its length.
10. A heat dissipating coal mine mining drill bit according to any one of claims 1-7, wherein the bit body is provided with at least one locating key slot on its side.

Description

Heat dissipation type coal mine excavating drill bit Technical Field The utility model relates to the technical field of drill bits, in particular to a heat dissipation type coal mine excavating drill bit. Background In the coal mining process, the drill bit needs to bear a large amount of heat generated by high-frequency impact, intense friction and rock breaking (especially in hard rock or deep mining, the surface temperature of the drill bit can reach more than 150 ℃). The traditional drill bit relies on flowing air to radiate the outside, so that the heat in the drill bit cannot radiate rapidly, and the drill bit material (such as hard alloy) is softened at high temperature, and cutting teeth burst or wear is aggravated, so that the service life of the drill bit is shortened. Disclosure of utility model The utility model aims to solve the technical problem of providing a heat dissipation type coal mine mining drill bit which adopts a double heat dissipation mode to improve the heat dissipation effect, and the heat dissipation type coal mine mining drill bit is characterized in that the heat dissipation type coal mine mining drill bit is cooled by air convection of an external heat dissipation pipeline and then is combined with an internal cooling cavity to absorb heat, so that the rapid heat dissipation is realized, and the working performance and the service life of the drill bit under the working conditions of high temperature and high load are improved. In order to achieve the above purpose, the present utility model adopts the following technical scheme: A heat dissipation type coal mine excavating drill bit comprises a drill bit body, a plurality of cutting tooth bodies protruding out of the drill bit body and extending from the side of the drill bit body to the head of the drill bit body, a plurality of cutting tooth heads embedded and fixed on the cutting tooth bodies, and a connecting end connected to the tail of the drill bit body; the drill bit body is internally provided with a cooling cavity, the center of the connecting end is provided with an injection port communicated with the cooling cavity, and cooling liquid (such as water or heat conducting oil) is filled into the cooling cavity through the injection port. Through adopting above-mentioned scheme, this heat dissipation formula colliery mining drill bit compares with traditional drill bit, and it adopts dual radiating mode, and outside is through the air flow heat dissipation promptly, and its inside absorbs the heat dissipation through the coolant liquid to promote holistic radiating effect by a wide margin, thereby avoid drill bit material (like carbide) because of high temperature softening, cutting tooth burst or wearing and tearing aggravate, can effectively prolong the life of drill bit. In order to further improve heat dissipation efficiency, the drill bit body is provided with at least one heat dissipation pipe penetrating into the cooling cavity but not communicated with the cooling cavity, wherein the wall of the heat dissipation pipe is thinner, two ends of the heat dissipation pipe are communicated with the outside, and at the moment, cooling liquid in the cooling cavity is directly contacted with the wall of the heat dissipation pipe, and heat of the cooling liquid can be dissipated to the outside along the inner cavity of the heat dissipation pipe. In order to prevent a radiating pipe from being blocked, two ends of the radiating pipe are respectively provided with a blocking sleeve with an opening in a detachable mode, two rolling steel balls are placed in the radiating pipe, the steel balls cannot be separated from the radiating pipe after being blocked by the blocking sleeve, and when the drill bit main body rotates at a high speed, the drill bit main body can drive the steel balls to swing outwards under the action of centrifugal force, so that the blocking can be avoided, and the effect of clearing the blocking can be achieved. In order to facilitate the disassembly and assembly of the blocking sleeve, a straight or cross-shaped slot is formed in the outer side of the blocking sleeve, and the blocking sleeve can be easily rotated by means of a tool. In order to prevent two steel balls from throwing outwards at the same end, a baffle for equally dividing the space in the pipe is arranged in the middle of the radiating pipe, the two steel balls are respectively positioned in the two spaces in the pipe, and radiating holes for communicating the spaces in the pipe are formed in the baffle so as to promote the air fluidity of the space in the pipe. In order to improve the air flowability along the axial direction of the drill bit body, the side surface of the drill bit body is provided with guide grooves which are positioned between two adjacent cutting tooth bodies and are parallel to the cutting tooth bodies, and when the drill bit body rotates at high height, the cutting tooth bodies are like fan blades, so that the ai