CN205532294U - Prevent punching a hole against current rivers change -over valve for coal mine - Google Patents

Abstract

An anti-backflow punching water flow conversion valve for coal mines, comprising a rod-shaped valve body, in which a central channel for water supply flow is provided, and in the central channel of the valve body, the valves are sequentially arranged from the tail to the head There are a punching mechanism, a water flow conversion mechanism and an anti-backflow mechanism. The punching mechanism includes a jet cavity located at the tail of the central channel and a plurality of jet nozzles. The water flow conversion mechanism includes valves arranged in sequence along the direction from the tail of the central channel to the head. Rod, water flow switching spool and valve seat I. The anti-backflow mechanism is composed of valve seat II, anti-backflow spool and abutment seat arranged in sequence along the direction from the tail to the head of the central channel. In the conversion valve described in the utility model, the water flow conversion mechanism is in a closed state under high water pressure conditions, and the water flow passes through the punching mechanism for punching operations; under low water pressure conditions, both the water flow conversion mechanism and the anti-backflow mechanism are in an open state. Drilling is possible, and the anti-backflow mechanism is sealed after the water supply is stopped to prevent coal water from backflowing into the valve body.

Description

A kind of anti-backflow punching water flow conversion valve for coal mine

technical field

The utility model relates to the field of mining equipment, in particular to an anti-backflow punching water flow conversion valve for coal mines.

Background technique

As the depth of coal seam drilling increases, the stress between coal seams also gradually increases. The gas drainage holes drilled by ordinary small drill bits are easily squeezed back by the stress between coal seams, which greatly reduces the efficiency of gas drainage. , hydraulic drilling technology has been gradually applied to coal seam mining since it was discovered in the 1980s until now. To achieve hydraulic punching, most of these equipment are relatively heavy and have many accessories, which are prone to reverse flow of coal water during the punching process, which will further cause blockage of the coal seam drainage hole and blockage of the valve body, which will directly affect the drilling efficiency of the drill pipe. Many problems, such as lower labor intensity and increased labor intensity of workers, are also the most important reasons why hydraulic punching technology cannot be promoted underground.

Utility model content

In order to solve the above problems, the purpose of this utility model is to propose a water flow switching valve which is used to prevent the backflow of coal water in the punching operation of coal mine water conservancy and integrates punching and drilling. The device is light, convenient and simple in structure. The practical application effect is good.

The technical solution adopted by the utility model in order to solve the above problems is: an anti-backflow punching water flow conversion valve for coal mines, which includes a rod-shaped valve body, and the valve body is provided with a central channel for water supply flow. The central channel of the valve body is provided with a punching mechanism, a water flow conversion mechanism and an anti-backflow mechanism in sequence from the tail to the head;

The punching mechanism includes a jet cavity located at the tail of the central channel and a plurality of jet nozzles, the injection ends of the plurality of jet nozzles are inserted into the jet cavity through the side wall of the valve body obliquely along the punching direction;

The water flow conversion mechanism includes a valve stem, a water flow switching valve core and a valve seat I arranged in sequence along the direction from the tail to the head of the central channel. One end of the valve stem is installed in the valve core, and the other end of the valve stem passes through the support seat and the valve seat I. The pressure-bearing plate is connected, and the valve stem is located between the pressure-bearing plate and the support seat. An elastic member I is installed on the rod body. between;

The anti-backflow mechanism is composed of a valve seat II, an anti-backflow spool and an abutment seat arranged in sequence from the tail to the head of the central channel. The valve seat II is fixed in the central channel, and one end of the anti-backflow spool is elastically Part II leans against the seat, and the other end of the anti-backflow valve core leans against the valve seat II under the action of the elastic part II.

Preferably, the elastic coefficient of the elastic member I is greater than the elastic coefficient of the elastic member II.

Preferably, the two ends of the valve body are respectively provided with a male joint and a female joint for connecting with a coal mine drill bit and a drilling machine.

Preferably, two jet nozzles are arranged symmetrically through the wall of the valve body.

Preferably, the supporting seat and the abutting seat are respectively provided with annular through holes for water flow.

Compared with the prior art, the utility model has the following beneficial effects:

First, in the anti-backflow punching water flow conversion valve for coal mine described in the utility model, when the punching mechanism is under high water pressure, the water pressure can press the water flow switching valve core against the valve seat tightly through the pressure plate On Ⅰ, the water flow is blocked and continues to pass through the water flow conversion mechanism. At this time, the high-pressure water flow can rush out through the jet nozzle to punch holes in the coal seam. The structure is simple and practical.

Second, the anti-backflow punching water flow conversion valve for coal mines described in the utility model uses low-pressure water flow during the drilling process. The anti-backflow spool drills into the coal seam. Once the water supply is stopped and the water pressure decreases, the anti-backflow spool returns to its original position under the action of elasticity and abuts against the valve seat II to form a seal, effectively preventing the backflow of coal water in the drill bit. Back inside the valve body.

Description of drawings

Fig. 1 is the structure schematic diagram of a kind of anti-backflow punching water flow conversion valve for coal mine of the present utility model;

Marks in the figure: 1. valve body, 2. jet cavity, 3. jet nozzle, 4. valve stem, 5. water flow switching valve core, 6. valve seat Ⅰ, 7. support seat, 8. pressure plate, 9. Elastic part I, 10, valve seat II, 11, anti-backflow valve core, 12, abutting seat, 13, elastic part II.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment provides detailed implementation methods and specific operating procedures on the premise of the technical solution of the utility model.

As shown in Figure 1, the utility model is an anti-backflow punching water flow conversion valve for coal mines, which includes a rod-shaped valve body 1, which is provided with a central channel for water supply flow, and the valve The central channel of the body 1 is provided with a punching mechanism, a water flow conversion mechanism and an anti-backflow mechanism in sequence from the tail to the head;

The punching mechanism includes a jet cavity 2 located at the tail of the central channel and a plurality of jet nozzles 3, and the injection ends of the plurality of jet nozzles 3 are inserted into the jet cavity 2 through the side wall of the valve body 1 obliquely along the punching direction;

The water flow conversion mechanism includes a valve stem 4, a water flow switching valve core 5 and a valve seat I6 arranged sequentially along the direction from the tail to the head of the central channel. One end of the valve stem 4 is inserted in the valve core 5, and the other end It passes through the support seat 7 and connects with the pressure bearing plate 8, and the valve stem 4 is located on the rod body between the pressure bearing plate 8 and the support base 7. An elastic member I9 is arranged on the rod body. The valve seat I6 is fixed in the central channel, and the water flow is switched. The valve core 5 is arranged between the support seat 7 and the valve seat I6;

The anti-backflow mechanism is composed of valve seat II10, anti-backflow valve core 11 and abutment seat 12 arranged in sequence along the direction from the tail of the central passage to the head, the valve seat II10 is fixed in the central passage, and the anti-backflow valve core 11 One end abuts against the abutting seat 12 through the elastic member II13, and the other end of the anti-backflow valve core 11 abuts against the valve seat II10 under the action of the elastic member II13.

The above are the basic implementation modes of the present utility model, and further improvements, optimizations or limitations can be made on the basis of the above.

Further, the elastic constant of the elastic member I9 is greater than the elastic constant of the elastic member II13.

Further, the two ends of the valve body 1 are respectively provided with a male joint and a female joint for connecting with a coal mine drill bit and a drilling machine.

Further, two jet nozzles 3 are arranged symmetrically through the wall of the valve body 1 .

Further, the supporting seat 7 and the abutting seat 12 are respectively provided with annular through holes for water flow.

The actual application process of the water flow switching valve described in the utility model is as follows:

In the normal drilling process, the flow rate and pressure of the water used are low, and the water flow first enters the valve body 1 through the jet chamber 2. At this time, due to the low pressure and low flow rate of the water flow, the water flow acts on the pressure The pressure on the plate 8 is less than the elastic force of the elastic part I9, which is not enough to make the elastic part I9 shrink and deform. At this time, the water flow switching valve core 5 at one end of the valve stem 4 and the valve seat I6 cannot form a sealed state, and the water flow can pass through the water flow. The conversion mechanism enters the anti-backflow mechanism. At this time, the anti-backflow spool 11 and the valve seat II 10 in the anti-backflow mechanism are in a sealed state. In the case of continuous water supply, the water pressure carried by the water flow exerts more and more force on the anti-backflow spool 11. When the force of the water pressure is greater than the elastic contraction limit of the elastic member II13, the elastic member II13 shrinks to separate the anti-backflow valve core 11 from the valve seat II10, and the water flows out of the drill bit through the anti-backflow mechanism to drill in the coal seam;

In the process of punching holes, the flow rate of the water used is relatively high and the pressure is relatively high. The water flow first enters the valve body 1 through the jet cavity 2. The pressure on the pressure plate 8 is greater than the elastic force of the elastic part Ⅰ9, and the elastic part Ⅰ9 shrinks and deforms under the action of water pressure. The valve stem 4 drives the water flow switching spool 5 to move axially, and the water flow switching spool 5 leans against the valve. On the seat I6, the water flow conversion mechanism forms a sealed state at this time, and the high-pressure water flow in the jet chamber 2 will flow out through the jet nozzle 3, and the high-pressure water flow will punch holes in the coal seam.

The water flow conversion valve described in the utility model can be used in the drilling and punching process of the coal seam. In use, it is only necessary to change the pressure of the water flow to easily realize the switching between the drilling and punching functions of the water flow conversion valve, avoiding the It solves the cumbersome problems caused by the replacement of spare parts for drilling and punching in conventional equipment, as well as the high labor intensity and low efficiency of workers, and the anti-backflow mechanism can effectively solve the problem of coal water backflowing into the valve body during drilling and punching. The problem of clogging the spool, the practical application effect of the water flow switching valve is good, the efficiency is high and the functions are complete.

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model in any form. Although the utility model has been described above with preferred embodiments, it is not intended to limit the utility model. Any Those who are familiar with this profession, without departing from the scope of the technical solution of the present utility model, may make use of the above-mentioned technical content to make some changes or modifications that are equivalent embodiments of equivalent changes, but all without departing from the scope of the present utility model The content of the technical solution, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model still belong to the scope of the technical solution of the utility model.

Claims (5)

1. An anti-backflow punching water flow switching valve for coal mines, comprising a rod-shaped valve body (1), the valve body (1) is provided with a central channel for water flow, characterized in that: in the valve The central channel of the body (1) is provided with a punching mechanism, a water flow conversion mechanism and an anti-backflow mechanism in sequence from the tail to the head; The punching mechanism includes a jet cavity (2) located at the end of the central channel and a plurality of jet nozzles (3), and the jet ends of the plurality of jet nozzles (3) are inserted obliquely through the side wall of the valve body (1) along the punching direction. Inside the jet chamber (2); The water flow conversion mechanism includes a valve stem (4), a water flow switching valve core (5) and a valve seat I (6) arranged sequentially along the direction from the tail of the central passage to the head, and one end of the valve stem (4) is pierced through the valve core In (5), the other end of the valve stem (4) passes through the support seat (7) and is connected to the pressure plate (8), and the valve stem (4) is located between the pressure plate (8) and the support seat (7) The rod body is provided with an elastic part I (9), the valve seat I (6) is fixed in the central channel, and the water flow switching valve core (5) is arranged between the support seat (7) and the valve seat I (6) ; The anti-backflow mechanism is composed of the valve seat II (10), the anti-backflow valve core (11) and the abutment seat (12) arranged in sequence along the direction from the tail to the head of the central channel, and the valve seat II (10) is fixed In the central channel, one end of the anti-backflow spool (11) is pressed against the seat (12) through the elastic piece II (13), and the other end of the anti-backflow spool (11) is under the action of the elastic piece II (13). Down against the valve seat II (10). 2. The anti-backflow punching water flow conversion valve for coal mines according to claim 1, characterized in that: the elastic coefficient of the elastic member I (9) is greater than the elastic coefficient of the elastic member II (13). 3. The anti-backflow punching water flow conversion valve for coal mines according to claim 1, characterized in that: the two ends of the valve body (1) are respectively provided with male and female holes for connecting with coal mine drills and drilling rigs. Connectors and female connectors. 4 . The anti-backflow punching water flow conversion valve for coal mines according to claim 1 , characterized in that: two jet nozzles ( 3 ) are arranged symmetrically on the wall of the valve body ( 1 ). 5. The anti-backflow punching water flow conversion valve for coal mines according to claim 1, characterized in that: the support seat (7) and the abutment seat (12) are respectively provided with annular channels for circulating water flow. hole.