A sealing device special for a coal powder sampling tube

Abstract

The present application relates to a kind of special sealing device of coal powder sampling tube, including inner sleeve, coaxial sleeve being arranged on the outer side of the inner sleeve, the gap for adjusting the size of its cylinder diameter is formed on the cylinder wall of the inner sleeve along its axial direction, adjusting member for adjusting the size of the gap is arranged between the inner sleeve and the outer sleeve.The present application provides a kind of special sealing device of coal powder sampling tube by double-layer sleeve design, realizes that device sealing effect is good, structure is simple and flexible, carrying, transportation and on-site assembly are convenient, coal powder leakage in sampling process can be effectively prevented, test personnel is protected, coal powder sampling time is greatly reduced, and work efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coal sampling, in particular to a sealing device special for a coal sampling tube. BACKGROUND

[0002] Coal fineness plays a very important role in the safe, stable and economic operation of a boiler. In order to obtain accurate and representative coal samples, various coal sampling devices have been developed in China. The most commonly used and typical coal sampling device is a flat head type or elbow type coal sampling gun.

[0003] During the actual operation of the coal sampling gun, coal leakage and environmental pollution problems exist to varying degrees. The traditional sealing device needs to be connected with compressed air for sealing. Since the compressed air flow guide pipe needs to be connected, the system complexity and the coal sampling time are increased, and the work efficiency is greatly reduced. How to reduce coal leakage and improve work efficiency during operation has become a common problem for test engineers. SUMMARY

[0004] The purpose of the present application is to provide a sealing device special for a coal sampling tube.

[0005] To achieve the above purpose, the technical solution adopted by the present application is as follows:

[0006] A sealing device special for a coal sampling tube, comprising an inner sleeve and an outer sleeve coaxially sleeved outside the inner sleeve, a gap for adjusting the size of the barrel diameter of the inner sleeve is formed on the barrel wall of the inner sleeve along the axial direction, and an adjusting member for adjusting the size of the gap is arranged between the inner sleeve and the outer sleeve.

[0007] Preferably, the inner sleeve comprises a first sleeve and a second sleeve, two edges of the first sleeve form a first butt joint edge, two edges of the second sleeve form a second butt joint edge, the first butt joint edge and the second butt joint edge are butted to form the inner sleeve, and the gap is formed between the first butt joint edge and the second butt joint edge.

[0008] Further preferably, the first butt joint edge and the second butt joint edge are both tooth-shaped joint edges.

[0009] Preferably, one of the outer peripheral surface of the inner sleeve and the inner peripheral surface of the outer sleeve is provided with a groove, and the other is provided with a protrusion, and the inner sleeve and the outer sleeve are connected through the protrusion and the groove.

[0010] Further preferably, the adjusting member is arranged between the groove and the protrusion.

[0011] More preferably, the adjusting member is an elastic member.

[0012] Still further preferably, a mounting hole is formed on the protrusion, and one end of the elastic member abuts against the bottom surface of the mounting hole, and the other end abuts against the bottom surface of the groove.

[0013] Further preferably, the groove is a dovetail groove, and the shape of the protrusion matches the groove.

[0014] Preferably, the sealing device further comprises side plates, and the side plates are arranged at both ends of the outer sleeve.

[0015] Preferably, the outer peripheral surface of at least one end of the outer sleeve is provided with a thread.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] The present invention provides a special sealing device for coal powder sampling tubes through a double-layer sleeve design, which achieves good sealing effect, simple and flexible structure, and convenient carrying, transportation and on-site assembly. It can effectively prevent coal powder leakage during the sampling process, protect test personnel, greatly reduce coal powder sampling time, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attachment Fig. 1 This is a front view of the dedicated sealing device for the pulverized coal sampling tube in this embodiment (the side plate is not installed);

[0019] Attachment Fig. 2 This is a side view of the dedicated sealing device for the pulverized coal sampling tube in this embodiment (the side plate is not installed);

[0020] Attachment Fig. 3 This is a top view of the dedicated sealing device for the pulverized coal sampling tube in this embodiment (the side plate is not installed);

[0021] Attachment Fig. 4 is a front view of the side panel in this embodiment;

[0022] Attachment Fig. 5 is a side view of the side panel in this embodiment;

[0023] Attachment Fig. 6 2 is a top view of the side panel in this embodiment.

[0024] In the above figures: 1, inner sleeve; 11, first set; 111, first docking edge; 12, second set; 121, second docking edge; 2, outer sleeve; 21, thread; 31, groove; 32, bump; 41, mounting hole; 42, adjusting piece; 5, gap; 6, side panel; 7, fixing hole. DETAILED DESCRIPTION

[0025] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, 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 therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] As shown in Figs. 1-3 A sealing device special for a pulverized coal sampling pipe, comprising an inner sleeve 1 and an outer sleeve 2 coaxially sleeved outside the inner sleeve 1, the outer sleeve 2 is used to connect the pulverized coal pipeline, and the inner sleeve 1 is used to connect the pulverized coal sampling pipe. The cylinder wall of the inner sleeve 1 is disconnected along the axial direction to form a gap 5 for adjusting the size of the cylinder diameter, and an adjusting member 42 is arranged between the inner sleeve 1 and the outer sleeve 2 to adjust the gap 5, so that the inner sleeve 1 is tightly fitted with the pulverized coal sampling pipe without leaving a gap, and the sealing effect is guaranteed. The overall structure of the device is simple, the number of combined parts is small, and the assembly, adjustment and transportation are flexible and convenient.

[0029] The inner sleeve 1 is divided into two parts: a first sleeve part 11 and a second sleeve part 12. The two edges of the first sleeve part 11 are formed with first abutting edges 111 extending in the axial direction, and the two edges of the second sleeve part 12 are formed with second abutting edges 121 extending in the axial direction. The first abutting edges 111 and the second abutting edges 121 abut with each other so that the first sleeve part 11 and the second sleeve part 12 are combined to form the inner sleeve 1. A gap 5 is formed between the first abutting edges 111 and the second abutting edges 121. The first abutting edges 111 and the second abutting edges 121 are formed with tooth-shaped abutting edges. The tooth-shaped abutting edges are spaced apart from each other by the gap 5 in the radial direction and abut with each other in the axial direction, so that the first sleeve part 11 and the second sleeve part 12 can be kept stable in the axial direction without relative sliding.

[0030] To facilitate installation, a groove 31 is formed on one of the outer circumferential surface of the inner sleeve 1 and the inner circumferential surface of the outer sleeve 2, and a protrusion 32 is arranged on the other one. The groove 31 and the protrusion 32 are arranged in the axial direction. The groove 31 and the protrusion 32 can prevent the inner sleeve 1 and the outer sleeve 2 from rotating relative to each other, so as to ensure the stability of the device and the sealing performance. To prevent the inner sleeve 1 and the outer sleeve 2 from being separated, the groove 31 is formed in the shape of a dovetail groove, and the protrusion 32 is formed in a shape matching the groove 31. In the embodiment, the protrusion 32 is arranged on the outer circumferential surface of the first sleeve part 11 and the second sleeve part 12, and the groove 31 is formed on the inner circumferential surface of the outer sleeve 2 and corresponds to the position of the protrusion 32.

[0031] An adjusting member 42 is arranged between the groove 31 and the protrusion 32. An installation hole 41 is formed in the protrusion 32. One end of the adjusting member 42 abuts against the bottom surface of the installation hole 41, and the other end of the adjusting member 42 abuts against the bottom surface of the groove 31. The adjusting member 42 is formed as an elastic member, and in the embodiment, the adjusting member 42 is formed as a spring. The inner sleeve 1 can be combined with or separated from the wall of the coal powder sampling tube at any time, and the gap 5 of the inner sleeve 1 can be automatically adjusted. The adjusting member 42 can prevent the coal powder sampling tube from being jammed. To ensure that the pressure is uniform at different positions of the inner sleeve 1, multiple sets of the adjusting member 42 and the installation hole 41 are arranged correspondingly.

[0032] The outer circumferential surface of at least one end of the outer sleeve 2 is provided with a thread 21, which is connected to a ball valve arranged on a reserved hole of a coal powder pipeline. In the embodiment, the outer sleeve 2 is provided with the thread 21 at both ends.

[0033] As shown in FIG. 1, Figs. 4-6 The device further includes a side plate 6. Multiple fixing holes 7 are formed in the two ends of the outer sleeve 2 and the side plate 6 correspondingly, and the side plate 6 is connected to the two ends of the outer sleeve 2 through the fixing holes 7. The side plate 6 can cover the notches at the two ends of the groove 31, so as to prevent the inner sleeve 1 from sliding out of the outer sleeve 2.

[0034] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A sealing device for a coal-sampling probe, characterized in that: The utility model discloses a sleeve, the outer sleeve of coaxial sleeve is set outside the inner sleeve of the sleeve, the side plate, the gap for adjusting the size of the barrel of the inner sleeve is formed on the barrel wall of the inner sleeve along the axial direction, the adjusting member for adjusting the size of the gap is arranged between the inner sleeve and the outer sleeve, the side plate is arranged at both ends of the outer sleeve, The inner sleeve comprises a first sleeve and a second sleeve, two edges of the first sleeve form a first butt joint edge, and two edges of the second sleeve form a second butt joint edge, the first butt joint edge and the second butt joint edge are butted to form the inner sleeve, and the gap is formed between the first butt joint edge and the second butt joint edge; One of the outer circumferential surface of the inner sleeve and the inner circumferential surface of the outer sleeve is provided with a groove, and the other is provided with a protrusion, and the inner sleeve and the outer sleeve are connected through the protrusion and the groove, Corresponding fixing holes are formed in both ends of the outer sleeve and the side plate, the side plate is connected to both ends of the outer sleeve through the fixing holes, and the side plate can shield the notches at both ends of the groove.

2. The sealing device for the coal sampling probe according to claim 1, characterized in that: The first butt joint edge and the second butt joint edge are both tooth-shaped joint edges.

3. The sealing device for the coal sampling probe according to claim 1, characterized in that: The adjusting member is arranged between the groove and the protrusion.

4. The sealing device for the coal sampling probe according to claim 3, characterized in that: The adjusting member is an elastic member.

5. The sealing device for the coal sampling probe according to claim 4, characterized in that: An installation hole is formed in the protrusion, one end of the elastic member abuts against the bottom surface of the installation hole, and the other end abuts against the bottom surface of the groove.

6. The sealing device for the coal sampling probe according to claim 1, characterized in that: The groove is a dovetail groove, and the shape of the protrusion is matched with the groove.

7. The sealing device for the coal sampling probe according to claim 1, characterized in that: The outer circumferential surface of at least one end of the outer sleeve is provided with threads.

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