A pneumatic grouting pump for coal mines

Abstract

This application discloses a pneumatic grouting pump for coal mines, relating to the field of pneumatic grouting pumps. It includes a pump body with connecting pipes fixedly installed on both sides. A limit component is provided at the bottom of the connecting pipe, and a locking component is provided at the top. The feed hose is inserted between the feed pipe and the spring plate. After insertion, rotating the internal threaded ring moves the abutment cylinder, causing it to engage with the driven block, thereby causing the spring plate to contract. The teeth on the inner side of the spring plate lock the feed hose in place. Installation is convenient and quick. The insertion pipe drives the insertion block to be inserted between two fixed seats. During insertion, pulling the connecting plate moves the insertion rod. After the insertion block is inserted, releasing the connecting plate allows the insertion rod to reset under the action of a tension spring. Then, a locking nut engages with the insertion rod to further lock it in place, ensuring a stable connection between the discharge hose and the discharge pipe when the grout is delivered.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic grouting pump technology, and in particular to a pneumatic grouting pump for coal mines. Background Technology

[0002] The coal mine pneumatic grouting pump is a grouting device specially designed for use in underground mines. It is powered by compressed air and is driven by air pressure to inject cement grout, chemical grout, and other slurries into coal seams or rock fissures under high pressure. This achieves engineering purposes such as sealing water inflow, reinforcing surrounding rock, and preventing gas leaks. It features explosion-proof safety, high delivery pressure, and adaptability to harsh underground environments.

[0003] When using existing pneumatic grouting pumps, compressed air is sent into the pneumatic motor to drive the piston to reciprocate. During the piston's stroke, a negative pressure is formed in one chamber to draw in grout, while the other chamber squeezes the grout. The alternating action is controlled by a reversing valve, thereby continuously generating high-pressure grout output. Finally, the grout is injected into the target layer through the grouting pipeline to complete the sealing or reinforcement work.

[0004] The existing pneumatic grouting pumps have connecting pipes on both sides of the pump body. The bottom of the connecting pipe is the grout inlet and the top is the grout outlet. In use, the grout inlet pipe and the grout outlet pipe are usually inserted into the grout inlet and the grout outlet respectively. Stable installation is achieved by the friction of the insertion. However, it lacks an auxiliary locking mechanism, which makes it inconvenient to use. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a pneumatic grouting pump for coal mines.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic grouting pump for coal mines, comprising: The pump body has connecting pipes fixedly installed on both sides; A limiting component is disposed at the bottom of the connecting pipe. The limiting component includes a feed pipe fixedly installed at the bottom of the connecting pipe. A fixing block is fixedly connected to the outer surface of the feed pipe. An external threaded pipe is fixedly connected to the side of the fixing block away from the connecting pipe. An internal threaded ring is threadedly connected to the outer surface of the external threaded pipe. A spring is fixedly connected between the feed pipe and the external threaded pipe on the side of the fixing block near the feed pipe. A driven block is fixedly connected to the outer surface of the spring. An abutment cylinder is fixedly connected to the side of the internal threaded ring near the feed pipe. A locking assembly is disposed at the top of the connecting pipe. The locking assembly includes a discharge pipe fixedly installed at the top of the connecting pipe. Two fixing seats are fixedly connected to the outer surface of the discharge pipe. An insert tube is inserted into the outer surface of the discharge pipe. An insert block is fixedly connected to the outer surface of the insert tube. An insert rod is inserted through the inside of the fixing seat. A connecting plate is fixedly connected to one end of the insert rod. A tension spring is fixedly connected between the connecting plate and the fixing seat.

[0007] In a preferred embodiment of the pneumatic grouting pump for coal mines described in this utility model, the outer surface of the driven block is provided with an inclined surface, and the inner side of the abutment cylinder near the driven block is provided with an inclined surface that cooperates with the driven block.

[0008] In a preferred embodiment of the pneumatic grouting pump for coal mines described in this utility model, an arc-shaped limiting strip is fixedly connected to the outer surface of the driven block on the side away from the fixed block.

[0009] In a preferred embodiment of the pneumatic grouting pump for coal mines described in this utility model, the cross-section of the spring sheet is arc-shaped, and the inner surface of the spring sheet is provided with helical teeth.

[0010] In a preferred embodiment of the pneumatic grouting pump for coal mines described in this utility model, both the plug-in block and the fixing seat have through holes that cooperate with the plug rod.

[0011] In a preferred embodiment of the pneumatic grouting pump for coal mines described in this utility model, a fixed cylinder is fixedly connected to the outer surface of the fixed seat near the tension spring, and the tension spring is disposed inside the fixed cylinder.

[0012] In a preferred embodiment of the pneumatic grouting pump for coal mines described in this utility model, the end of the insert rod away from the connecting plate passes through the interior of the fixed base, and a locking nut is threaded onto the outer surface of the end of the insert rod away from the connecting plate.

[0013] This utility model provides a pneumatic grouting pump for coal mines. It has the following beneficial effects: 1. Insert the feed hose between the feed tube and the spring. After insertion, rotate the internal threaded ring, which will drive the abutment cylinder to move. This will cause the abutment cylinder to engage with the driven block, thereby causing the spring to retract. The teeth on the inner side of the spring will lock the feed hose in place, making installation convenient and quick.

[0014] 2. The insertion tube drives the insertion block to be inserted between the two fixed seats. During the insertion process, the connecting plate is pulled, thereby driving the insertion rod to move. After the insertion block is inserted, the connecting plate is released, and the insertion rod is driven to return to its original position under the action of the tension spring. Then, the locking nut cooperates with the insertion rod to achieve further locking, thereby ensuring that the connection between the discharge hose and the discharge pipe is stable when the slurry is delivered. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is an exploded structural diagram of the limiting component of this utility model.

[0018] Figure 3 This is an exploded structural diagram of the locking component of this utility model.

[0019] Figure 4 This is a utility model Figure 3 A magnified structural diagram of A in the middle.

[0020] In the diagram, 1. Pump body; 2. Connecting pipe; 3. Limiting assembly; 301. Feed pipe; 302. Fixing block; 303. External threaded pipe; 304. Internal threaded ring; 305. Abutment cylinder; 306. Spring; 307. Arc-shaped limiting strip; 308. Driven block; 4. Locking assembly; 401. Discharge pipe; 402. Insertion block; 403. Insertion pipe; 404. Insertion rod; 405. Connecting plate; 406. Tension spring; 407. Fixing seat; 408. Locking nut; 409. Fixing cylinder. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example 1

[0022] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a coal mine pneumatic grouting pump, comprising: Pump body 1, with connecting pipes 2 fixedly installed on both sides of pump body 1; The limiting component 3 is located at the bottom of the connecting pipe 2. The limiting component 3 includes a feed pipe 301 fixedly installed at the bottom of the connecting pipe 2. A fixing block 302 is fixedly connected to the outer surface of the feed pipe 301. An external threaded pipe 303 is fixedly connected to the side of the fixing block 302 away from the connecting pipe 2. An internal threaded ring 304 is threadedly connected to the outer surface of the external threaded pipe 303. A spring piece 306 is fixedly connected between the feed pipe 301 and the external threaded pipe 303 on the side of the fixing block 302 near the feed pipe 301. A driven block 308 is fixedly connected to the outer surface of the spring piece 306. An abutment cylinder 305 is fixedly connected to the side of the internal threaded ring 304 near the feed pipe 301.

[0023] like Figure 1 and Figure 2 In this embodiment, the outer surface of the driven block 308 is provided with an inclined surface, and the inner side of the abutment cylinder 305 near the driven block 308 is provided with an inclined surface that cooperates with the driven block 308. The abutment cylinder 305 is driven to approach the driven block 308 by the internal threaded ring 304, thereby realizing the cooperation between the inclined surface of the outer surface of the driven block 308 and the inclined surface of the inner side of the abutment cylinder 305, thereby driving the spring piece 306 to retract, thereby compressing the hose inserted between the spring piece 306 and the feed pipe 301.

[0024] like Figure 1 and Figure 2 In this embodiment, an arc-shaped limiting strip 307 is fixedly connected to the outer surface of the driven block 308 away from the fixed block 302. By setting the arc-shaped limiting strip 307, when the abutting cylinder 305 cooperates with the arc-shaped limiting strip 307, the internal thread ring 304 cannot continue to move, thereby preventing the internal thread ring 304 from disengaging from the external thread tube 303.

[0025] like Figure 1 and Figure 2 In this embodiment, the cross-section of the spring piece 306 is arc-shaped, and the inner side of the spring piece 306 is provided with helical teeth. By setting the helical teeth, the friction between the feed hose and the spring piece 306 is increased, ensuring that the feed hose cannot detach.

[0026] Furthermore, the feed hose is inserted between the feed pipe 301 and the spring plate 306. After insertion, the internal threaded ring 304 is rotated, thereby driving the abutment cylinder 305 to move through the internal threaded ring 304. This causes the abutment cylinder 305 to engage with the driven block 308, thereby causing the spring plate 306 to retract. The teeth on the inner side of the spring plate 306 lock the feed hose in place. Installation is convenient and quick. Both the feed hose and the discharge hose are external hoses. The feed hose is inserted into the feed pipe 301, and the discharge hose is fixedly connected to the insertion pipe 403. The pump body... 1. The connection relationship, working principle and operation sequence between the feed hose and the discharge hose and other components are existing technologies and common knowledge known to those skilled in the art. They will not be elaborated here. During the use of the pump body 1, the feed pipe 301 is under negative pressure or suction. The direction of slurry flow is opposite to the direction of feed hose disengagement. The axial tension on the feed hose is small. Therefore, the friction between the helical teeth on the inner surface of the spring 306 and the outer wall of the feed hose is sufficient to ensure its connection is stable. Moreover, this structure facilitates quick insertion, removal and adjustment. Example 2

[0027] Reference Figure 1 , Figure 3 and Figure 4 This is the second embodiment of the present invention, which is based on the previous embodiment. The locking component 4 is disposed on the top of the connecting pipe 2. The locking component 4 includes a discharge pipe 401 fixedly installed on the top of the connecting pipe 2. Two fixing seats 407 are fixedly connected to the outer surface of the discharge pipe 401. An insert tube 403 is inserted into the outer surface of the discharge pipe 401. An insert block 402 is fixedly connected to the outer surface of the insert tube 403. An insert rod 404 is inserted through the inside of the fixing seat 407. A connecting plate 405 is fixedly connected to one end of the insert rod 404. A tension spring 406 is fixedly connected between the connecting plate 405 and the fixing seat 407.

[0028] like Figure 1 , Figure 3 and Figure 4 In this embodiment, both the plug-in block 402 and the fixing base 407 have through holes that cooperate with the plug rod 404. By inserting the plug rod 404 into the through hole, the plug-in block 402 and the fixing base 407 are locked together.

[0029] like Figure 1 , Figure 3 and Figure 4 In this embodiment, a fixing cylinder 409 is fixedly connected to the outer surface of the fixing base 407 near the tension spring 406, and the tension spring 406 is disposed inside the fixing cylinder 409.

[0030] like Figure 1 , Figure 3 and Figure 4In this embodiment, the end of the insertion rod 404 away from the connecting plate 405 passes through the interior of the fixing base 407, and a locking nut 408 is threaded onto the outer surface of the end of the insertion rod 404 away from the connecting plate 405.

[0031] Furthermore, the insertion tube 403 is inserted into the discharge pipe 401, and then the insertion block 402 is inserted between the two fixed seats 407. During the insertion process, the connecting plate 405 is pulled, thereby moving the insertion rod 404. After the insertion block 402 is inserted, the connecting plate 405 is released, and the insertion rod 404 is reset under the action of the tension spring 406. Then, the locking nut 408 cooperates with the insertion rod 404 to achieve further locking, thereby ensuring that when the slurry is delivered, the discharge hose remains connected to the discharge pipe 401 even when it is under high pressure. During the use of the pump body 1, the discharge pipe 401 is subjected to high pressure during grouting, and the slurry generates a large axial thrust and pulsating impact on the discharge hose. If only friction connection is relied upon, it is easy to cause the discharge hose to loosen or the slurry to leak. Therefore, the reliability of the discharge end is ensured by the double locking of the insertion rod 404 and the locking nut 408.

[0032] Working principle: When using the coal mine pneumatic grouting pump, insert the feed hose between the feed pipe 301 and the spring plate 306. After insertion, rotate the internal threaded ring 304, which drives the abutment cylinder 305 to move, causing the abutment cylinder 305 to engage with the driven block 308, thereby causing the spring plate 306 to retract. This allows the teeth on the inner side of the spring plate 306 to lock the feed hose in place, making installation convenient and quick. Then, install the discharge hose by inserting the insertion tube 403 into the discharge pipe 401. The insertion block 402 is inserted between the two fixed seats 407. During the insertion process, the connecting plate 405 is pulled, thereby moving the insertion rod 404. After the insertion block 402 is inserted, the connecting plate 405 is released. Under the action of the tension spring 406, the insertion rod 404 is reset. Then, the locking nut 408 cooperates with the insertion rod 404 to achieve further locking, thereby ensuring that when the grout is delivered, the discharge hose remains connected to the discharge pipe 401 even when it is under great pressure. Finally, the installation and use of the grouting pump are completed.

[0033] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A coal mine pneumatic grouting pump, characterized in that, include: Pump body (1), with connecting pipes (2) fixedly installed on both sides of the pump body (1); A limiting component (3) is provided at the bottom of the connecting pipe (2). The limiting component (3) includes a feed pipe (301) fixedly installed at the bottom of the connecting pipe (2). A fixing block (302) is fixedly connected to the outer surface of the feed pipe (301). An external threaded pipe (303) is fixedly connected to the side of the fixing block (302) away from the connecting pipe (2). An internal threaded ring (304) is threadedly connected to the outer surface of the external threaded pipe (303). A spring piece (306) is fixedly connected between the feed pipe (301) and the external threaded pipe (303) on the side of the fixing block (302) close to the feed pipe (301). A driven block (308) is fixedly connected to the outer surface of the spring piece (306). An abutment cylinder (305) is fixedly connected to the side of the internal threaded ring (304) close to the feed pipe (301). Locking component (4) is provided on the top of connecting pipe (2). The locking component (4) includes a discharge pipe (401) fixedly installed on the top of connecting pipe (2). Two fixing seats (407) are fixedly connected to the outer surface of the discharge pipe (401). A plug tube (403) is inserted into the outer surface of the discharge pipe (401). A plug block (402) is fixedly connected to the outer surface of the plug tube (403). A plug rod (404) is inserted into the inside of the fixing seat (407). A connecting plate (405) is fixedly connected to one end of the plug rod (404). A tension spring (406) is fixedly connected between the connecting plate (405) and the fixing seat (407).

2. The pneumatic grouting pump for coal mines according to claim 1, characterized in that: The outer surface of the driven block (308) is provided with an inclined surface, and the inner side of the abutting cylinder (305) near the driven block (308) is provided with an inclined surface that cooperates with the driven block (308).

3. A pneumatic grouting pump for coal mines according to claim 2, characterized in that: An arc-shaped limiting strip (307) is fixedly connected to the outer surface of the driven block (308) away from the fixed block (302).

4. A pneumatic grouting pump for coal mines according to claim 3, characterized in that: The cross-section of the spring piece (306) is arc-shaped, and the inner surface of the spring piece (306) is provided with helical teeth.

5. A pneumatic grouting pump for coal mines according to claim 4, characterized in that: Both the plug block (402) and the fixing base (407) have through holes that cooperate with the plug rod (404).

6. A pneumatic grouting pump for coal mines according to claim 5, characterized in that: A fixed cylinder (409) is fixedly connected to the outer surface of the fixed base (407) near the tension spring (406), and the tension spring (406) is disposed inside the fixed cylinder (409).

7. A pneumatic grouting pump for coal mines according to claim 6, characterized in that: The end of the insert (404) away from the connecting plate (405) passes through the interior of the fixing seat (407), and a locking nut (408) is threaded onto the outer surface of the end of the insert (404) away from the connecting plate (405).

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