1. The utility model provides a synchronous continuous conveyor drilling rod hydraulic system of area locking function which characterized in that: the hydraulic control system comprises an oil tank, a manual reversing valve, a hydraulic control reversing valve, a hydraulic lock, a flow distributing and collecting valve, a left lifting oil cylinder, a right lifting oil cylinder, a bracket, a lower stroke valve and an upper stroke valve; the manual reversing valve adopts a two-position four-way steel ball positioning type M-shaped slide valve; the hydraulic control reversing valve adopts a two-position four-way spring reset type reversing slide valve; the upper stroke valve and the lower stroke valve both adopt two-position two-way spring return type slide valves;

an oil inlet P of the manual reversing valve is externally connected with a high-pressure oil source P1, an oil return port T of the manual reversing valve is externally connected with an oil tank, a working oil port A and a working oil port B of the manual reversing valve are respectively and correspondingly connected with an oil inlet P and an oil return port T of the hydraulic control reversing valve, the working oil port A and the working oil port B of the hydraulic control reversing valve are in one-to-one correspondence with two oil inlets of a hydraulic lock, one oil outlet of the hydraulic lock is connected with rod cavities of a left lifting oil cylinder and a right lifting oil cylinder, the other oil outlet of the hydraulic lock is connected with an oil inlet of a flow dividing and collecting valve, an oil outlet of the flow dividing and collecting valve is connected with rodless cavities of the left lifting oil cylinder and the right lifting oil cylinder, the left lifting oil cylinder and the right lifting oil cylinder are arranged in parallel, and piston rods of the flow dividing and collecting valve are upwards connected with a bracket;

an oil inlet of the lower stroke valve is externally connected with a low-pressure control oil source P2, an oil outlet of the lower stroke valve is respectively connected with an oil inlet of the upper stroke valve and a control oil port of the hydraulic control reversing valve, and an oil outlet of the upper stroke valve is connected with an oil tank;

the valve core of the hydraulic control reversing valve is reversed by matching the on-off of the upper travel valve and the lower travel valve, so that the oil flow direction of the left lifting oil cylinder and the right lifting oil cylinder is controlled, the piston rods of the left lifting oil cylinder and the right lifting oil cylinder are pushed to synchronously extend or retract, the bracket is driven to reciprocate to lift, and in the process, the bracket continuously lifts the drill rod in the drill rod conveying device so as to convey the drill rod into a drill rod box of the automatic drilling machine.

2. The synchronous continuous conveying drill rod hydraulic system with the locking function as claimed in claim 1, characterized in that: the upper stroke valve and the lower stroke valve are symmetrically arranged, and one sides of the upper stroke valve and the lower stroke valve facing each other are provided with rollers; the bracket is in reciprocating lifting between the upper stroke valve and the lower stroke valve, wherein the bracket is in contact with the roller of the lower stroke valve when the piston rods of the left lifting oil cylinder and the right lifting oil cylinder retract to the lowest stroke, and is in contact with the roller of the upper stroke valve when the piston rods of the left lifting oil cylinder and the right lifting oil cylinder ascend to the highest stroke, so that the on-off of the upper stroke valve and the lower stroke valve is excited.

3. The synchronous continuous conveying drill rod hydraulic system with the locking function as claimed in claim 1, characterized in that: the valve core of the lower travel valve is in a normally open position, and the valve core of the upper travel valve is in a normally closed position.

Background

In the coal mining process, operations such as gas drainage, water exploration and drainage and the like are often required due to safety requirements, and drilling operation is required for the operations. The hydraulic drilling machine is production equipment commonly adopted in coal mine gas extraction operation. The capacity of a drill rod box of the drilling machine is limited, and the working efficiency of the drilling machine is influenced by the fact that the drill rod box is empty. Therefore, it is necessary to develop a work efficiency improvement of a drilling machine by increasing a drill rod carrying capacity of the drilling machine.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a hydraulic system with a locking function for synchronously and continuously conveying drill rods, which can continuously convey drill rods to a drill rod box, improve the carrying capacity of the drill rod of a drilling machine, and overcome the adverse effect on the working efficiency of the drilling machine due to the limited capacity of the drill rod box.

In order to achieve the purpose, the invention provides the following technical scheme:

a synchronous continuous conveying drill rod hydraulic system with a locking function comprises an oil tank, a manual reversing valve, a hydraulic control reversing valve, a hydraulic lock, a flow dividing and collecting valve, a left lifting oil cylinder, a right lifting oil cylinder, a bracket, a lower stroke valve and an upper stroke valve; the manual reversing valve adopts a two-position four-way steel ball positioning type M-shaped slide valve; the hydraulic control reversing valve adopts a two-position four-way spring reset type reversing slide valve; the upper stroke valve and the lower stroke valve both adopt two-position two-way spring return type slide valves;

an oil inlet P of the manual reversing valve is externally connected with a high-pressure oil source P1, an oil return port T of the manual reversing valve is externally connected with an oil tank, a working oil port A and a working oil port B of the manual reversing valve are respectively and correspondingly connected with an oil inlet P and an oil return port T of the hydraulic control reversing valve, the working oil port A and the working oil port B of the hydraulic control reversing valve are in one-to-one correspondence with two oil inlets of a hydraulic lock, one oil outlet of the hydraulic lock is connected with rod cavities of a left lifting oil cylinder and a right lifting oil cylinder, the other oil outlet of the hydraulic lock is connected with an oil inlet of a flow dividing and collecting valve, an oil outlet of the flow dividing and collecting valve is connected with rodless cavities of the left lifting oil cylinder and the right lifting oil cylinder, the left lifting oil cylinder and the right lifting oil cylinder are arranged in parallel, and piston rods of the flow dividing and collecting valve are upwards connected with a bracket;

an oil inlet of the lower stroke valve is externally connected with a low-pressure control oil source P2, an oil outlet of the lower stroke valve is respectively connected with an oil inlet of the upper stroke valve and a control oil port of the hydraulic control reversing valve, and an oil outlet of the upper stroke valve is connected with an oil tank;

the valve core of the hydraulic control reversing valve is reversed by matching the on-off of the upper travel valve and the lower travel valve, so that the oil flow direction of the left lifting oil cylinder and the right lifting oil cylinder is controlled, the piston rods of the left lifting oil cylinder and the right lifting oil cylinder are pushed to synchronously extend or retract, the bracket is driven to reciprocate to lift, and in the process, the bracket continuously lifts the drill rod in the drill rod conveying device so as to convey the drill rod into a drill rod box of the automatic drilling machine.

Furthermore, the upper stroke valve and the lower stroke valve are symmetrically arranged, and one sides of the upper stroke valve and the lower stroke valve facing each other are provided with rollers; the bracket is in reciprocating lifting between the upper stroke valve and the lower stroke valve, wherein the bracket is in contact with the roller of the lower stroke valve when the piston rods of the left lifting oil cylinder and the right lifting oil cylinder retract to the lowest stroke, and is in contact with the roller of the upper stroke valve when the piston rods of the left lifting oil cylinder and the right lifting oil cylinder ascend to the highest stroke, so that the on-off of the upper stroke valve and the lower stroke valve is excited.

Further, the valve core of the lower travel valve is in a normally open position, and the valve core of the upper travel valve is in a normally closed position.

The invention has the beneficial effects that:

the invention automatically controls the ascending and descending processes of the bracket for lifting the drill rod by utilizing a manual reversing valve, a hydraulic control reversing valve, an oil cylinder, a stroke valve and the like, and realizes the aim of continuously and automatically conveying the drill rod by reciprocating and lifting the bracket. The flow distributing and collecting valve can ensure that the left and right lifting oil cylinders keep synchronous running speed and the bracket runs stably. The left lifting oil cylinder and the right lifting oil cylinder are locked by adopting the hydraulic lock, so that the bracket is stopped at any position in the travel range, the sliding down caused by the dead weight of the lifting drill rod is prevented, the stable, reliable and efficient work of a drill rod conveying system is finally ensured, and the drilling efficiency of the automatic drilling machine is improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a hydraulic system with locking function for synchronous continuous conveying of drill rods.

Reference numerals: the hydraulic control system comprises an oil tank 1, a manual reversing valve 2, a hydraulic control reversing valve 3, a hydraulic lock 4, a flow dividing and collecting valve 5, a left lifting oil cylinder 6, a right lifting oil cylinder 7, a bracket 8, a lower stroke valve 9 and an upper stroke valve 10.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Referring to fig. 1, the hydraulic system with a locking function for synchronous and continuous conveying of drill rods comprises an oil tank 1, a manual reversing valve 2, a hydraulic control reversing valve 3, a hydraulic lock 4, a flow dividing and collecting valve 5, a left lifting oil cylinder 6, a right lifting oil cylinder 7, a bracket 8, a lower stroke valve 9 and an upper stroke valve 10.

The oil tank 1 is a component for storing oil in the hydraulic system, and plays a role in cooling and heat dissipation to a certain extent. The manual reversing valve 2 adopts a two-position four-way steel ball positioning type M-shaped slide valve, and the flow direction of oil can be switched by operating a handle. The hydraulic control reversing valve 3 adopts a two-position four-way spring reset type reversing slide valve and can control the extension and retraction of piston rods of the left lifting oil cylinder 6 and the right lifting oil cylinder 7. The flow distributing and collecting valve 5 has the functions of flow distributing and flow combining, can accurately control the proportion distribution of outlet oil liquid, and realizes the synchronous action of the left lifting oil cylinder 6 and the right lifting oil cylinder 7. The upper stroke valve 10 and the lower stroke valve 9 both adopt two-position two-way spring reset type slide valves for controlling the reversing of the valve core of the hydraulic control reversing valve 3. The spool of the lower stroke valve 9 is in a normally open position, and the spool of the upper stroke valve 10 is in a normally closed position.

Specifically, an oil inlet P of the manual reversing valve 2 is externally connected with a high-pressure oil source P1, an oil return port T of the manual reversing valve 2 is externally connected with an oil tank 1, a working oil port a and a working oil port B of the manual reversing valve 2 are respectively and correspondingly connected with the oil inlet P and the oil return port T of the hydraulic control reversing valve 3, the working oil port a and the working oil port B of the hydraulic control reversing valve 3 are in one-to-one correspondence with two oil inlets of the hydraulic lock 4, one oil outlet of the hydraulic lock 4 is connected with rod cavities of the left lifting oil cylinder 6 and the right lifting oil cylinder 7, the other oil outlet of the hydraulic lock 4 is connected with an oil inlet of the flow dividing and collecting valve 5, an oil outlet of the flow dividing and collecting valve 5 is connected with rodless cavities of the left lifting oil cylinder 6 and the right lifting oil cylinder 7, the left lifting oil cylinder 6 and the right lifting oil cylinder 7 are arranged in parallel, and a piston rod of the flow dividing and collecting valve is upwards connected with a bracket 8.

An oil inlet of the lower stroke valve 9 is externally connected with a low-pressure control oil source P2, an oil outlet of the lower stroke valve 9 is respectively connected with an oil inlet of the upper stroke valve 10 and a control oil port of the hydraulic control reversing valve 3, and an oil outlet of the upper stroke valve 10 is connected with the oil tank 1.

The upper stroke valve 10 and the lower stroke valve 9 are symmetrically arranged, and one sides of the upper stroke valve and the lower stroke valve facing each other are provided with rollers; the bracket 8 is lifted and lowered back and forth between the upper stroke valve 10 and the lower stroke valve 9, wherein the bracket 8 is contacted with the roller of the lower stroke valve 9 when the piston rods of the left lifting oil cylinder 6 and the right lifting oil cylinder 7 are retracted to the lowest stroke, and is contacted with the roller of the upper stroke valve 10 when the piston rods of the left lifting oil cylinder 6 and the right lifting oil cylinder 7 are lifted to the highest stroke, so that the on-off of the upper stroke valve 10 and the lower stroke valve 9 is triggered.

The working principle of the hydraulic system is as follows:

1. lifting state:

the manual reversing valve 2 is manually operated, the lower part of the valve is communicated, and the system starts to work. Oil provided by an external high-pressure oil source P1 flows through the lower position of the manual reversing valve 2, the upper position of the hydraulic control reversing valve 3, the hydraulic lock 4, the rod cavities of the left lifting oil cylinder 6 and the right lifting oil cylinder 7, the rodless cavity, the oil collected by the flow dividing and collecting valve 5 and the oil collected by the rodless cavity are merged back to the oil tank 1, and the piston rod drives the bracket 8 to descend; when the bracket 8 contacts with the roller of the lower stroke valve 9 in place, the upper machine of the valve core of the lower stroke valve 9 can be connected, and the oil provided by the low-pressure control oil source P2 flows into the lower stroke valve 9 and then is divided into two parts: one strand of oil flows into the upper stroke valve 10, and at the moment, the valve core of the upper stroke valve 10 is at an upper position, the valve core is in a disconnected state, the oil cannot be unloaded, and the pressure maintaining state is realized; another strand of oil flows into the hydraulic control reversing valve 3 through the control oil port, at the moment, the lower valve core position machine of the hydraulic control reversing valve 3 is switched on under the action of low-pressure control oil, the flow direction of the oil of the left lifting oil cylinder 6 and the right lifting oil cylinder 7 is immediately reversed, namely, oil is fed into the rodless cavities of the left lifting oil cylinder 6 and the right lifting oil cylinder 7, oil is returned from the rod cavities, at the moment, the piston rod drives the bracket 8 to start to rise, then the bracket 8 is separated from contact with the roller of the lower stroke valve 9, the lower valve core position machine is switched on under the action of the spring, at the moment, the valve core is closed, the low-pressure control oil source P2 is cut off, the existing low-pressure control oil is sealed, pressure maintaining is realized, the hydraulic control reversing valve 3 is continuously acted, and the bracket 8 continuously rises. The carriage 8 lifts the drill rods in the rod transfer device to transfer them into the rod magazine of the automatic drilling machine.

2. A descending state:

when the bracket 8 rises to the highest position, the bracket 8 is contacted with the roller of the upper travel valve 10, at the moment, the lower valve core position machine of the upper travel valve 10 is communicated, the valve core is opened, and the existing low-pressure control oil is unloaded immediately and returns to the oil tank 1. At the moment, the hydraulic control reversing valve 3 is reset by a spring, the upper computer can be communicated, the valve core is reversed, oil is fed into the rod cavities of the left lifting oil cylinder 6 and the right lifting oil cylinder 7, oil is fed back from the rodless cavities, and then the piston rod drives the bracket 8 to descend again.

3. And continuously repeating the process of descending-ascending-descending until the drill rod is conveyed.

When the system needs to be stopped or in standby, the manual reversing valve 2 is operated to enable the upper computer to be connected, and the external high-pressure oil source P1 realizes unloading and returns to the oil tank 1.

The hydraulic system automatically controls the ascending and descending processes of a bracket 8 for lifting the drill rod by using a manual reversing valve 2, a hydraulic control reversing valve 3, an oil cylinder, a stroke valve and the like, and achieves the purpose of continuous and automatic conveying of the drill rod by reciprocating and ascending and descending of the bracket 8. The oil proportion distribution of the oil at the oil outlet can be accurately controlled by adopting the flow dividing and collecting valve 5, the synchronous action of the left lifting oil cylinder 6 and the right lifting oil cylinder 7 is realized, and when the oil is reversed, the oil can be converged to form a strand of oil; the simultaneous action of the two oil cylinders can ensure the stable operation of the bracket 7 and improve the rigidity characteristic of the system. The hydraulic lock 4 is adopted to ensure that the bracket 8 can stay at any position between the upper stroke valve 9 and the lower stroke valve 10, so as to prevent the drill rod from sliding downwards due to the dead weight of the drill rod, finally ensure the stable, reliable and efficient work of a drill rod conveying system, and improve the drilling efficiency of the automatic drilling machine.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.