External water supply system of guide rail type rock drill

Abstract

The utility model aims to provide an external water supply system of a guide rail type rock drill, the two ends of a water sealing shell are connected outside a connecting sleeve in a rotary sealing manner through sealing end covers, a sealing piece is arranged between an annular boss and the sealing end covers, an inner sealing ring is arranged on the inner side of the annular boss, and an outer sealing ring is arranged on the outer side of the annular boss. The inner sealing ring comprises a thrust face and a sealing face which are arranged oppositely, and the thrust face and the sealing face are connected through an annular connecting body. The utility model relates to the technical field of industrial equipment, and adopts an inner sealing ring to be matched with a sealing piece to form double sealing. Compared with a single sealing ring in the prior art, the sealing effect is greatly improved through the double-sealing structure, water leakage is effectively prevented, and sufficient water supply pressure is ensured. When the thrust face of the inner sealing ring is impacted by high-pressure water flow, the annular connecting body of the inner sealing ring is bent and then abuts against the wall face of the annular boss and the wall face of the connecting sleeve, it is ensured that a gap between the annular boss and the connecting sleeve is blocked, and the sealing performance of the inner sealing ring is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial equipment, in particular to an external water supply system of a guide rail type rock drill. Background Art

[0002] Existing rock drill technology generally uses an internal water supply, namely, water is supplied through the drill stem's butt. A sealing structure is provided at the drill stem's butt to seal the drill stem from the water supply mechanism. This structure primarily consists of a housing, an end cap, and a sealing gasket. However, this single sealing ring has certain drawbacks, resulting in a poor sealing effect. This poor sealing effect can easily lead to water leakage, which in turn leads to insufficient water supply pressure, significantly impacting the rock drill's operating efficiency. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides an external water supply system for a rail-type rock drill, which solves the problem that when the drill tail of the drill rod of the existing rock drill is supplied with water, its sealing structure has a poor sealing effect, which leads to leakage.

[0004] To achieve the above-mentioned object, the present invention is implemented through the following technical solutions: an external water supply system for a rail-type rock drill, the external water supply system being installed on the drill rod of the rock drill, the external water supply system comprising a connecting sleeve and a water-sealed housing with a water inlet, the drill rod extending into the connecting sleeve and the two being fixedly connected, the two ends of the water-sealed housing being rotatably sealed to the outside of the connecting sleeve via sealing end covers, annular bosses being provided on both sides of the inner wall of the water-sealed housing, a sealing member being provided between the annular bosses and the sealing end covers, an inner sealing ring being provided on the inner side of the annular bosses, and the inner sealing ring being sleeved on the connecting sleeve;

[0005] The inner sealing ring includes a thrust surface and a sealing surface that are arranged opposite to each other. The thrust surface is attached to the inner wall surface of the annular boss. The sealing surface is clamped between the seal and the inner sealing ring. The thrust surface and the sealing surface are connected by an annular connector. The annular connector is located between the annular boss and the connecting sleeve.

[0006] Preferably, the radial length of the annular connector is greater than the wall thickness of the annular boss; wherein, when the thrust surface is impacted by high-pressure water flow, the thrust surface fits tightly against the wall surface of the annular boss, causing the annular connector to bend and contact the wall surface of the annular boss and the connecting sleeve.

[0007] Preferably, a plurality of sealing protrusion rings are provided on the wall surface of the annular boss where the thrust surface is close to the wall surface of the annular boss. When the thrust surface is close to the wall surface of the annular boss, the sealing protrusion rings abut against the wall surface of the annular boss, and a sealing cavity is formed between two adjacent sealing protrusion rings and the wall surface of the annular boss.

[0008] Preferably, side guide platforms are provided on both sides of the inner wall of the water-sealed housing, an internal pressure cavity is formed between the side guide platforms and the annular boss, and the inner sealing ring is located in the internal pressure cavity.

[0009] Preferably, the inner side of the sealing end cover is inwardly recessed to form an annular groove, the annular groove is sleeved on the end of the water-tight shell, and is connected to the end of the water-tight shell by bolts passing through the annular groove portion of the sealing end cover.

[0010] Preferably, a polygonal groove is formed on the inner side of the sealing end cover at the bottom of the annular groove, and a limiting member is provided between the sealing end cover and the sealing member, and the limiting member is embedded in the polygonal groove.

[0011] Preferably, the limiting member includes:

[0012] an annular body, located in the water-tight housing;

[0013] The polygonal body is embedded in the polygonal groove.

[0014] Preferably, a gasket is provided between the limiting member and the sealing member.

[0015] Beneficial effects

[0016] By using the external water supply system of a rail-type rock drill provided by the utility model, an inner sealing ring is used in conjunction with a sealing member to form a double seal. Compared with the single sealing ring of the prior art, the double sealing structure greatly improves the sealing effect, effectively prevents water leakage, and ensures sufficient water supply pressure. When the thrust surface of the inner sealing ring is impacted by a high-pressure water flow, the thrust surface fits tightly against the wall surface of the annular boss, and a sealing cavity is formed between the sealing protrusion ring and the wall surface of the annular boss, effectively preventing water from penetrating outward. After the annular connector of the inner sealing ring is bent, it contacts the wall surface of the annular boss and the connecting sleeve, ensuring that the gap between the annular boss and the connecting sleeve is blocked, further enhancing the sealing performance of the inner sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axial cross-sectional view of the external water supply system of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the limiting member of the utility model;

[0019] Figure 3 This is a schematic diagram of the sealing end cover structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the inner sealing ring structure of the present utility model;

[0021] Figure 5 It is a schematic diagram of the enlarged structure of the inner sealing ring of the utility model.

[0022] Explanation of symbols in the figure

[0023] 1. Drill rod, 2. Connecting sleeve, 3. Water-sealed shell, 4. Seal, 5. Sealing end cover, 6. Annular boss, 7. Inner sealing ring, 71. Thrust surface, 72. Sealing surface, 73. Annular connector, 74. Sealing raised ring, 75. Sealing chamber, 8. Limiting piece, 81. Polygonal body, 82. Ring body, 9. Gasket, 10. Side guide platform, 11. Internal pressure chamber, 12. Annular groove, 13. Polygonal groove. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. As long as the effects of the present invention can be exerted, various changes can be made to the embodiments.

[0025] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process.

[0026] Reference Figure 1-5 The external water supply system of the guide rail rock drill of this embodiment will be described. The external water supply system is installed on the drill rod 1 of the rock drill and is used to supply water to the liquid guide hole in the drill rod 1.

[0027] like Figure 1 As shown, the external water supply system of this embodiment includes a connecting sleeve 2 and a water-sealed housing 3 with a water inlet. The water inlet is connected to a water supply pipe, and the drill rod 1 extends into the connecting sleeve 2 and the two are fixedly connected. The connecting sleeve 2 has an opening, which corresponds to the water inlet of the water-sealed housing 3 and the water inlet hole of the drill rod 1.

[0028] Both ends of the water-sealed housing 3 are rotatably sealed to the outside of the connecting sleeve 2 through sealing end covers 5 . Annular bosses 6 are provided on both sides of the inner wall of the water-sealed housing 3 , and a sealing member 4 is provided between the annular boss 6 and the sealing end covers 5 .

[0029] Furthermore, in this embodiment, an inner sealing ring 7 is provided on the inner side of the annular boss 6, and the inner sealing ring 7 is sleeved on the connecting sleeve 2; the cooperation between the inner sealing ring 7 and the sealing member 4 forms a double seal. Specifically, the sealing member 4 seals between the annular boss 6 and the sealing end cover 5, and the inner sealing ring 7 seals between the annular boss 6 and the connecting sleeve 2.

[0030] Specifically, such as Figure 4 and Figure 5As shown, the inner sealing ring 7 in this embodiment includes a thrust surface 71 and a sealing surface 72 arranged opposite to each other. The thrust surface 71 and the sealing surface 72 are both annular bodies, wherein the thrust surface 71 is recessed inward to form a recessed surface, and the recessed surface is located on the side close to the annular boss 6 and is attached to the inner wall surface of the annular boss 6. The sealing surface 72 is clamped between the seal 4 and the inner sealing ring 7. The thrust surface 71 and the sealing surface 72 are connected by an annular connector 73, and the annular connector 73 is located between the annular boss 6 and the connecting sleeve 2.

[0031] The radial length of the annular connector 73 is greater than the wall thickness of the annular boss 6; wherein, when the thrust surface 71 is impacted by the high-pressure water flow, the thrust surface 71 is tightly fitted on the wall surface of the annular boss 6, and the thrust surface 71 is displaced by the impact of the high-pressure water flow, so that the annular connector 73 is bent and abuts against the wall surface of the annular boss 6 and the connecting sleeve 2, so as to ensure that the gap between the annular boss 6 and the connecting sleeve 2 is sealed, thereby enhancing the sealing performance of the inner sealing ring 7.

[0032] Furthermore, a plurality of sealing protrusion rings 74 are provided on the wall surface of the annular boss 6 where the thrust surface 71 is close to the wall surface of the annular boss 6. The function of the plurality of sealing protrusion rings 74 is as follows: when the thrust surface 71 is close to the wall surface of the annular boss 6, the sealing protrusion rings 74 abut against the wall surface of the annular boss 6. At this time, a sealing cavity 75 is formed between two adjacent sealing protrusion rings 74 and the wall surface of the annular boss 6 to prevent water from penetrating outward.

[0033] In a preferred implementation of this embodiment, side guide platforms 10 are provided on both sides of the inner wall of the water-sealed shell 3. The side guide platforms 10 are inclined outward from the connection end with the water-sealed shell 3, so that an internal pressure chamber 11 is formed between the side guide platforms 10 and the annular boss 6. The inner sealing ring 7 is located in the internal pressure chamber 11. Part of the water flowing into the water-sealed shell 3 enters the drill rod 1 along the opening of the connecting sleeve 2, and part of the water fills the water-sealed shell 3. The water is guided by the inclined side guide platforms 10 to directly act on the thrust surface 71 of the inner sealing ring 7, so that the thrust surface 71 is fitted on the annular boss 6, and at the same time, the annular connector 73 is bent and respectively contacts the wall surfaces of the annular boss 6 and the connecting sleeve 2.

[0034] The inner side of the sealing end cover 5 is recessed inward to form an annular groove 12, which is adapted to the end of the water-tight housing 3. When assembling the sealing end cover 5, the sealing end cover 5 is not flange-mounted and docked with the water-tight housing 3, but is sleeved so that the sealing end cover 5 is wrapped around the port area of ​​the water-tight housing 3 and connected to the end of the water-tight housing 3 by bolts passing through the annular groove 12 of the sealing end cover 5.

[0035] like Figure 1 and Figure 2 and Figure 3As shown, a polygonal groove 13 is formed on the inner side of the sealing end cap 5 at the bottom of the annular groove 12. A limiter 8 is provided between the sealing end cap 5 and the sealing member 4, and the limiter 8 is embedded in the polygonal groove 13. A gasket 9 is provided between the limiter 8 and the sealing member 4. The limiter 8 includes a polygonal body 81 and an annular body 82. The annular body 82 is located in the water-tight housing 3, and the polygonal body 81 is embedded in the polygonal groove 13.

[0036] The limiter 8, through the design of its polygonal body 81 and the cooperation with the polygonal groove 13 on the inner side of the sealing end cover 5, can avoid slight rotation of the sealing end cover 5 in the working state, ensure the firmness of the bolts on the sealing end cover 5, and prevent the loosening of the bolts due to the long-term vibration of the sealing end cover 5, which may lead to gaps in the connection between the sealing end cover 5 and the water-tight housing 3.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An external water supply system for a rail-type rock drill, wherein the external water supply system is installed on a drill rod (1) of the rock drill, and is characterized in that: The external water supply system comprises a connecting sleeve (2) and a water-sealed housing (3) with a water inlet, the drill rod (1) extends into the connecting sleeve (2) and the two are fixedly connected, both ends of the water-sealed housing (3) are connected to the outside of the connecting sleeve (2) in a rotational sealing manner via sealing end covers (5), annular bosses (6) are provided on both sides of the inner wall of the water-sealed housing (3), a sealing member (4) is provided between the annular boss (6) and the sealing end cover (5), an inner sealing ring (7) is provided on the inner side of the annular boss (6), and the inner sealing ring (7) is sleeved on the connecting sleeve (2); The inner sealing ring (7) comprises a thrust surface (71) and a sealing surface (72) arranged opposite to each other, wherein the thrust surface (71) is attached to the inner wall surface of the annular boss (6), and the sealing surface (72) is sandwiched between the sealing member (4) and the inner sealing ring (7), and the thrust surface (71) and the sealing surface (72) are connected via an annular connector (73), and the annular connector (73) is located between the annular boss (6) and the connecting sleeve (2).

2. The external water supply system of a rail-type rock drill according to claim 1, characterized in that: The radial length of the annular connector (73) is greater than the wall thickness of the annular boss (6); wherein, when the thrust surface (71) is impacted by the high-pressure water flow, the thrust surface (71) is tightly fitted on the wall surface of the annular boss (6), so that the annular connector (73) is bent and abuts against the wall surfaces of the annular boss (6) and the connecting sleeve (2).

3. The external water supply system of a rail-type rock drill according to claim 1 or 2, characterized in that: A plurality of sealing protrusion rings (74) are provided on the wall surface of the annular boss (6) where the thrust surface (71) is close to the wall surface of the annular boss (6). When the thrust surface (71) is close to the wall surface of the annular boss (6), the sealing protrusion rings (74) abut against the wall surface of the annular boss (6), and a sealing cavity (75) is formed between two adjacent sealing protrusion rings (74) and the wall surface of the annular boss (6).

4. The external water supply system of a rail-type rock drill according to claim 1, characterized in that: Side guide platforms (10) are provided on both sides of the inner wall of the water-sealed housing (3); an internal pressure chamber (11) is formed between the side guide platforms (10) and the annular boss (6); and the inner sealing ring (7) is located in the internal pressure chamber (11).

5. The external water supply system of a rail-type rock drill according to claim 1, characterized in that: The inner side of the sealing end cover (5) is inwardly recessed to form an annular groove (12), which is sleeved on the end of the water-sealed housing (3) and connected to the end of the water-sealed housing (3) via a bolt passing through the annular groove (12) of the sealing end cover (5).

6. The external water supply system of a rail-type rock drill according to claim 5, characterized in that: A polygonal groove (13) is formed at the bottom of the annular groove (12) on the inner side of the sealing end cover (5), and a limiting member (8) is provided between the sealing end cover (5) and the sealing member (4), and the limiting member (8) is embedded in the polygonal groove (13).

7. The external water supply system of a rail-type rock drill according to claim 6, characterized in that: The limiting member (8) includes: An annular body (82) is located in the water-tight housing (3); The polygonal body (81) is embedded in the polygonal groove (13).

8. The external water supply system of a rail-type rock drill according to claim 6 or 7, characterized in that: A gasket (9) is provided between the limiting member (8) and the sealing member (4).

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