CN210234955U - Anti-blocking sand spreading valve of anti-explosion locomotive - Google Patents

Abstract

The utility model provides an explosion-proof locomotive prevents blockking up and spills sand valve, the purpose is solved current locomotive and spills sand valve and arouses the jam because of the sand body backward flow to influence the technical problem of locomotive braking safety. A guide cylinder is fixedly arranged in the valve body of the sanding valve, and a piston rod with a plug fixed at the top is driven by an electric actuator to reciprocate in the guide cylinder, so that the movable sealing of the plug on a sand inlet of the valve body is realized. The utility model seals the sand inlet when the sanding is finished by adding the plug inside the valve body, so that the sand in the sanding pipe connected with the rear end of the sand outlet and the cavity of the valve body is discharged completely, thereby avoiding the blockage caused by the backflow of the sand in the valve body of the prior sanding valve due to the air tap of the air inlet; meanwhile, the blockage caused by the hardening of the sand material in the sand sprinkling pipe is avoided, so that the braking safety performance of the explosion-proof locomotive is ensured.

Description

Anti-blocking sand spreading valve of anti-explosion locomotive

Technical Field

The utility model belongs to the technical field of explosion-proof locomotive braking technique and specifically relates to a sand valve is spilt in explosion-proof locomotive jam prevention.

Background

The explosion-proof locomotive runs and brakes under a mine by means of traction and brake adhesion friction force generated by interaction of wheel rails. However, the adhesion of the wheels and rails of the underground track is rapidly reduced due to the adhesion of coal dust and the like, so that the wheels of the locomotive slide, and the wheels and the rails are scratched. At present, sanding is the most commonly used tackifier and is also one of the ideal tackifiers with good tackifying effect and economical efficiency.

The prior explosion-proof locomotive mostly adopts a valve type sanding device, and a valve body of the prior explosion-proof locomotive is provided with a sand inlet, an air inlet and a sand outlet. Sand material enters the valve body from the sand inlet under the disturbance of the sand blowing nozzle of the air inlet, and then is pressed into the slender sand spraying pipe from the sand outlet by the sand blowing nozzle to finish sand spraying. After sanding is finished, negative pressure is formed in the valve body, so that sand in the valve body flows back to the air inlet, and easily enters the air tap to cause blockage; meanwhile, residual sand in the sand sprinkling pipe cannot be thoroughly discharged under the action of negative pressure, and is easy to harden in a wet environment underground to cause blockage, so that the braking safety of the locomotive is adversely affected.

Disclosure of Invention

To the above-mentioned condition, for overcoming prior art's defect, the utility model provides an explosion-proof locomotive prevents blockking up and spills sand valve has solved current locomotive and has spilt sand valve and arouse the jam because of the sand body backward flow to influence the safe technical problem of locomotive braking.

In order to achieve the above object, the utility model provides a following technical scheme:

an explosion-proof locomotive prevents blockking up sanding valve includes:

the valve body is provided with an inner accommodating space, and the outer wall of the valve body is provided with a sand inlet, an air inlet and a sand outlet;

the guide cylinder is provided with an internal accommodating space and is vertically and fixedly arranged in the valve body right below the sand inlet;

the piston rod is movably arranged in the guide cylinder, and the front end of the piston rod penetrates through the top of the guide cylinder, and the rear end of the piston rod penetrates through the bottom of the guide cylinder and the valve body in sequence;

the plug is fixedly arranged at the top of the piston rod, and the bottom of the plug is movably connected with the top of the guide cylinder;

and the electric actuator is fixed on the outer wall of the valve body, and the actuating end of the electric actuator is connected with the rear end of the piston rod.

Further, this sanding valve still includes:

the telescopic sealing sleeve is provided with an inner containing space, the top of the telescopic sealing sleeve is fixed at the bottom of the plug, the bottom of the telescopic sealing sleeve is fixed at the inner wall of the valve body, and the guide cylinder and the piston rod are sleeved with the telescopic sealing sleeve.

Further, the top of the plug is in a dome shape.

Furthermore, the plug is made of elastic rubber.

Furthermore, the electric actuator adopts a straight-stroke electric actuator, and the actuating end is coaxial with the piston rod.

Further, the electric actuator adopts an intrinsic safety type.

The utility model seals the sand inlet when the sanding is finished by adding the plug inside the valve body, so that the sand in the sanding pipe connected with the rear end of the sand outlet and the cavity of the valve body is discharged completely, thereby avoiding the blockage caused by the backflow of the sand in the valve body of the prior sanding valve due to the air tap of the air inlet; meanwhile, the blockage caused by the hardening of the sand material in the sand sprinkling pipe is avoided, so that the braking safety performance of the explosion-proof locomotive is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic view of a partial structure of an embodiment of the present invention.

Fig. 3 is a schematic structural view of the telescopic sleeve of the embodiment of the present invention.

Reference numerals: 1. the valve comprises a valve body, 2 parts of a sand inlet, 3 parts of an air inlet, 4 parts of a sand outlet, 5 parts of a guide cylinder, 6 parts of a piston rod, 7 parts of a plug, 8 parts of an electric actuator, 81 parts of an actuating end and 9 parts of a telescopic sealing sleeve.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the claimed embodiments. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", and the like refer to the orientation or positional relationship shown in the drawings, which are used for convenience of description and simplification of the description of the embodiments of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the embodiments of the present application.

In the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the embodiments of the present application, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of the embodiments of the present application, the components and arrangements of the specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present application. Moreover, the claimed embodiments may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of brevity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The utility model discloses application embodiment provides an explosion-proof locomotive prevents blockking up sanding valve, should spill the sanding valve and include:

the valve body 1 is provided with an inner accommodating space, and the outer wall is provided with a sand inlet 2, an air inlet 3 and a sand outlet 4. The sand inlet 2 is connected with the sand box and guides sand into the valve body 1. The air inlet 3 is connected with a compression air path, on one hand, sand in the valve body 1 is pressed to the sand outlet 4 through an air nozzle arranged in the valve body 1, and is discharged from a sand spraying pipe connected with the sand outlet 4 for sand spraying; on the other hand, the sand material in the valve body 1 is disturbed to ensure that the sand material continuously enters the valve body 1 from the sand inlet 2. After the communication between the air inlet 3 and the compression air passage is cut off, negative pressure is formed in the valve body 1, so that sand materials move towards the air inlet 3, and the sand materials easily enter the air nozzle to cause blockage.

And the guide cylinder 5 is provided with an inner accommodating space and is vertically and fixedly arranged in the valve body 1 right below the sand inlet 2. And the piston rod 6 is movably arranged in the guide cylinder 5, and the front end of the piston rod penetrates through the top of the guide cylinder 5, and the rear end of the piston rod penetrates through the bottom of the guide cylinder 5 and the valve body 1 in sequence. The piston rod 6 can vertically and reciprocally move under the sand inlet 2 under the guiding action of the guiding cylinder 5.

And the plug 7 is fixedly arranged at the top of the piston rod 6, and the bottom of the plug is movably connected with the top of the guide cylinder 5. The top of the plug 7 can be movably sealed with the sand inlet 2 under the driving of the piston rod 6 so as to block sand from entering the valve body 1.

The top of the plug 7 is in a dome shape and made of elastic rubber so as to ensure the sealing effect of the plug 7 on the sand inlet 2 and avoid sand from leaking into the valve body 1.

And the electric actuator 8 is fixed on the outer wall of the valve body 1, and an actuating end 81 of the electric actuator is connected with the rear end of the piston rod 6. The electric actuator 8 drives the piston rod 6 to reciprocate according to the instruction.

The electric actuator 8 adopts a straight-stroke electric actuator, and the actuating end 81 is coaxial with the piston rod 6. The smoothness of the driving of the electric actuator 8 to the piston rod 6 is ensured.

The electric actuator 8 is of intrinsic safety type. The explosion-proof requirement in the well is met.

The telescopic sealing sleeve 9 is provided with an inner containing space, the top of the telescopic sealing sleeve is fixed at the bottom of the plug 7, the bottom of the telescopic sealing sleeve is fixed at the inner wall of the valve body 1, and the guide cylinder 5 and the piston rod 6 are sleeved with the telescopic sealing sleeve. The telescopic sealing sleeve 9 is used for isolating the piston rod 6 from sand in the valve body 1 so as to ensure the normal operation of the assembly and prolong the service life in a limited way.

The using method comprises the following steps:

after the sanding operation is completed, the driver triggers the stop mechanism. By adopting the existing automatic control technology, firstly, an electric signal is sent to the electric actuator 8, so that the execution end 81 of the electric actuator pushes the piston rod 6 upwards; meanwhile, the connection relation between the air inlet 3 and the compression air passage is closed in a delayed manner.

Under the guiding action of the guiding cylinder 5, the top of the plug 7 is attached to the sand inlet 2 for sealing, and sand is prevented from entering the valve body 1. And the sand in the valve body 1 is discharged to the sanding pipe from the sand outlet 4 under the action of compressed gas blown by the air tap at the air inlet 3, so that no sand remains in the valve body 1 and the sanding pipe. Thereby thoroughly solving the problems of sand material backflow and hardening.

Claims (6)

1. The utility model provides an explosion-proof locomotive prevents blockking up sanding valve, is including valve body (1) that has inside accommodation space, and valve body (1) outer wall department has seted up into sand mouth (2), air intake (3) and sand outlet (4), and its characterized in that should sand the valve and still include:

the guide cylinder (5) is provided with an internal accommodating space and is vertically and fixedly arranged in the valve body (1) right below the sand inlet (2);

the piston rod (6) is movably arranged in the guide cylinder (5), and the front end of the piston rod penetrates through the top of the guide cylinder (5), and the rear end of the piston rod penetrates through the bottom of the guide cylinder (5) and the valve body (1) in sequence;

the plug (7) is fixedly arranged at the top of the piston rod (6), and the bottom of the plug is movably connected with the top of the guide cylinder (5);

the electric actuator (8) is fixed on the outer wall of the valve body (1), and an actuating end (81) of the electric actuator is connected with the rear end of the piston rod (6).

2. The sanding valve of claim 1, further comprising:

the telescopic sealing sleeve (9) is provided with an inner containing space, the top of the telescopic sealing sleeve is fixed at the bottom of the plug (7), the bottom of the telescopic sealing sleeve is fixed at the inner wall of the valve body (1), and the guide cylinder (5) and the piston rod (6) are sleeved with the telescopic sealing sleeve.

3. A sanding valve according to claim 1, characterized in that the top of the stopper (7) is domed.

4. A sanding valve according to claim 1 or 3, characterized in that the plug (7) is of an elastic rubber material.

5. A sanding valve according to claim 1, characterized in that the electric actuator (8) is a straight-stroke electric actuator, the actuating end (81) being coaxial with the piston rod (6).

6. A sanding valve according to claim 1 or 5, characterized in that the electric actuator (8) is of the intrinsically safe type.

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