Mining gas extraction negative pressure automatic water discharging device

Abstract

The utility model discloses a mine gas extraction negative pressure automatic water discharging device which comprises a negative pressure pump and a water discharging device body. The water discharging device is installed at one end of the water outlet and comprises a connecting body, the connecting body is provided with a sliding body and a fixed body, a reset spring is arranged between the sliding body and the fixed body, a water storage opening is formed in one side of the connecting body, and when the water discharging device is in a first state, the sliding body is located at the upper end of the water storage opening, and the reset spring is in a normal state; when the water drainer is in the second state, the sliding body is located at the lower end of the water storage opening, and the reset spring is in a compressed state. When the water amount of the water storage area is increased to a certain value, water flow flowing to the water storage area reversely flows into the connecting body, thrust of water flow flowing to the second connecting end from the first connecting end to the sliding body is reduced, water, located in the water storage area at the upper end of the water storage opening, of the sliding body flows to the second connecting end under the action of the gravity of the water flow, and therefore automatic water drainage is achieved.

Description

Technical Field

[0001] The utility model relates to a gas extraction technology, in particular to a negative pressure automatic water discharger for mining gas extraction. Background Art

[0002] When the fully-mechanized mining face in underground coal mines is in a water-bearing area or the roof of the gas extraction drilling site is watered, water will accumulate in the gas extraction pipeline, seriously affecting the gas extraction effect. When water accumulates in the pipeline, the gas pipeline valve needs to be closed or the pump needs to be stopped to drain the water.

[0003] Chinese patent application CN112212049B, the patent sequentially connects a tee, a negative pressure regulating device, a first straight pipe and a second straight pipe from top to bottom, the negative pressure regulating device is used to adjust the opening between the tee and the first straight pipe, the first straight pipe is used to collect water, the upper part of the second straight pipe is provided with an upper sealing disc with a through hole in the middle, the lower part of the second straight pipe is provided with a lower sealing disc with a through hole in the middle, a float is provided between the upper sealing disc and the lower sealing disc, a discharge port is provided at the bottom of the second straight pipe, and a floating disc is provided between the discharge port and the lower sealing disc to realize automatic water discharge. The structure is relatively complex, the production cost is high, and further improvement is needed. Utility Model Content

[0004] Based on the above technical problems, the utility model proposes a negative pressure automatic water drainer for mine gas extraction.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A negative pressure automatic water discharger for mining gas extraction comprises a negative pressure pump and a water discharger, wherein the negative pressure pump comprises a pump body, the output shaft of the pump body is connected to a pump head via a spline shaft, and a water inlet and a water outlet are respectively arranged on both sides of the pump head.

[0007] The water discharger is installed at one end of the water outlet, and the water discharger includes a connecting body, the connecting body has a sliding body and a fixed body, and a return spring is arranged between the sliding body and the fixed body, wherein a water storage port is arranged on one side of the connecting body, when the water discharger is in a first state, the sliding body is located at the upper end of the water storage port, and the return spring is in a normal state; when the water discharger is in a second state, the sliding body is located at the lower end of the water storage port, and the return spring is in a compressed state.

[0008] Furthermore, a cavity is provided in the middle of the pump head, which is connected to the water inlet and the water outlet. Upper end covers are provided at the upper and lower ends of the pump head, and multiple check valves are provided below the upper end covers. The multiple check valves are divided into two groups and are located on both sides of the pump head, and the cavity is divided into a first cavity and a second cavity by the check valve.

[0009] Furthermore, a camshaft is provided in the middle of the pump head, and the camshaft is connected with the spline shaft so that the output shaft of the pump body is driven by the spline shaft to rotate the camshaft. Piston rods are provided on both sides of the upper end of the camshaft, and the piston rods move back and forth up and down along the middle of the pump head.

[0010] Furthermore, the check valve is composed of a movable end, a return spring and a fixed end, the fixed end is installed on one side of the pump head, and the movable end is slidably connected to the fixed end via the return spring.

[0011] Furthermore, the connecting body has a first connecting end and a second connecting end. The water flows from the first connecting end to the second connecting end and pushes the sliding body toward the second connecting end. Part of the water flows into the water storage area from the water storage port. When the thrust of the water flow decreases, the water in the water storage area is discharged from the second connecting end.

[0012] The implementation of the utility model of the negative pressure automatic water discharger for mining gas extraction has the following beneficial effects:

[0013] When the amount of water in the water storage area increases to a certain value, the water flowing into the water storage area will flow in the opposite direction into the connecting body, reducing the thrust of the water flowing from the first connecting end to the second connecting end on the sliding body, so that the water in the water storage area at the upper end of the sliding body located at the water storage port will flow to the second connecting end under the action of its own gravity, thereby realizing automatic water discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the negative pressure pump of the utility model;

[0015] Figure 2 It is a partial cross-sectional view of the negative pressure pump of the utility model;

[0016] Figure 3 It is a partial cross-sectional view of the water discharger of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the first state of the water discharger of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the water discharger of the utility model in the second state;

[0019] The reference numerals are as follows: 100 - negative pressure pump, 101 - pump body, 102 - spline shaft, 103 - pump head, 104 - water inlet, 105 - water outlet, 106 - first cavity, 107 - upper end cover, 108 - check valve, 108A - movable end, 108B - return spring, 108C - fixed end, 109 - piston rod, 110 - second cavity, 111 - camshaft, 200 - drain, 201 - connecting body, 202A - first connecting end, 202B - second connecting end, 203 - sliding body, 204 - fixed body, 205 - return spring, 206 - water storage port, 207 - limiting end. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figures 1 to 5 As shown, the negative pressure automatic water discharger for mining gas extraction of the utility model comprises a negative pressure pump 100 and a water discharger 200. Figure 1 to Figure 2 As shown, the negative pressure pump 100 includes a pump body 101, and the output shaft of the pump body 101 is connected to the pump head 103 via a spline shaft 102. A camshaft 111 is provided in the middle of the pump head 103, and the camshaft 111 is connected with the spline shaft 102 so that the output shaft of the pump body 101 can be driven by the spline shaft 102 to rotate the camshaft 111. Piston rods 109 are provided on both sides of the upper end of the camshaft 111, and the rotation of the camshaft 111 will drive the piston rod 109 to reciprocate up and down along the middle of the pump head 103.

[0022] A water inlet 104 and a water outlet 105 are respectively provided on both sides of the pump head 103. When the piston rod 109 reciprocates in the middle of the pump head 103, the air inside the pump head 103 is compressed, so that a negative pressure is formed in the pump head 103, forcing water to enter from the water inlet 104 and be discharged from the water outlet 105.

[0023] Furthermore, a cavity is also provided in the middle of the pump head 103, and the cavity is connected with the water inlet 104 and the water outlet 105. Upper end covers 107 are also provided at the upper and lower ends of the pump head 103, and multiple check valves 108 are provided below the upper end covers 107. The multiple check valves 108 are divided into two groups and are located on both sides of the pump head 103. The cavity is divided into a first cavity 106 and a second cavity 110 by the check valve 108. Water enters from the water inlet 104, passes through the first cavity 106 and the check valve 108 on one side, enters the second cavity 110, and then passes through the first cavity 106 and the check valve 108 on the other side, and finally is discharged from the water outlet 105. The check valve 108 is composed of a movable end 108A, a return spring 108B and a fixed end 108C. The fixed end 108C is installed on one side of the pump head 103. The movable end 108A is slidably connected to the fixed end 108C via the return spring 108B. When water flows through the movable end 108A and rushes toward the fixed end 108C, the return spring 108B is compressed, so that the water flows into or out of the second cavity 110.

[0024] Specifically, when the piston rod 109 is in an upward state, a low-pressure environment is formed. Due to the pressure difference, the liquid enters the pump head 103 through the water inlet 104 and fills the second cavity 110 above the piston rod 109; when the piston rod 109 moves downward, the second cavity 110 below the piston rod 109 is filled with liquid, and at the same time, the second cavity 110 above discharges the liquid through the first cavity 106 and the check valve 108 on the other side, and the cycle is repeated continuously to generate a continuous liquid flow.

[0025] The water discharger 200 is installed at one end of the water outlet 105. Figures 3 to 5 As shown, the water discharger 200 includes a connecting body 201. The connecting body 201 has a first connecting end 202A and a second connecting end 202B. The first connecting end 202A is sleeved on one end of the water outlet 105. A sliding body 203 is provided at one end of the connecting body 201 close to the first connecting end 202A. A fixed body 204 is provided at one end of the connecting body 201 close to the second connecting end 202B. A return spring 205 is provided between the sliding body 203 and the fixed body 204. A water storage port 206 is provided on one side of the connecting body 201. When the water discharger 200 is in the first state, the sliding body 203 is located at the upper end of the water storage port 206, and the return spring 205 is in a normal state; when the water discharger 200 is in the second state, the sliding body 203 is located at the lower end of the water storage port 206, and the return spring 205 is in a compressed state.

[0026] In this embodiment, when the water discharger 200 is in the first state, the sliding body 203 is located at the upper end of the water storage port 206, and the limiting end 207 contacts the upper end of the sliding body 203, limiting the maximum upward travel of the sliding body 203. When the negative pressure pump 100 starts to operate, the water flows from the first connection end 202A to the second connection end 202B, and pushes the sliding body 203 toward the second connection end 202B, and the return spring 205 is compressed until the sliding body 203 is located at the lower end of the water storage port 206. At this time, the gravity of the water and the upward thrust of the return spring 205 reach a balance value, and part of the water flows through the water storage port 206 to the water storage area. When the amount of water in the water storage area increases to a certain value, the water flowing to the water storage area will flow back into the connector 201, and form a reaction force with the water flowing from the first connection end 202A to the second connection end 202B, reducing the thrust of the water flowing from the first connection end 202A to the second connection end 202B on the sliding body 203. The reset spring 205 then returns to its position, and the sliding body 203 is located at the upper end of the water storage port 206. At this time, the water in the water storage area flows to the second connection end 202B under the action of its own gravity. Subsequently, the sliding body 203 slides downward again under the action of the water flowing from the first connection end 202A to the second connection end 202B, so that it is located at the lower end of the water storage port 206, and the working cycle is performed in sequence, thereby realizing automatic water discharge of the negative pressure pipeline.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A negative pressure automatic water discharger for mining gas extraction, comprising a negative pressure pump (100) and a water discharger (200), characterized in that: The negative pressure pump (100) comprises a pump body (101), the output shaft of the pump body (101) being connected to a pump head (103) via a spline shaft (102), and a water inlet (104) and a water outlet (105) are respectively provided on both sides of the pump head (103). The water discharger (200) is installed at one end of the water outlet (105). The water discharger (200) comprises a connecting body (201). The connecting body (201) has a sliding body (203) and a fixed body (204). A return spring (205) is arranged between the sliding body (203) and the fixed body (204). A water storage port (206) is arranged on one side of the connecting body (201). When the water discharger (200) is in a first state, the sliding body (203) is located at the upper end of the water storage port (206), and the return spring (205) is in a normal state. When the water discharger (200) is in a second state, the sliding body (203) is located at the lower end of the water storage port (206), and the return spring (205) is in a compressed state.

2. The negative pressure automatic water discharger according to claim 1, characterized in that: A cavity is also provided in the middle of the pump head (103), and the cavity is communicated with the water inlet (104) and the water outlet (105). Upper end covers (107) are also provided at the upper and lower ends of the pump head (103), and a plurality of check valves (108) are provided below the upper end covers (107). The plurality of check valves (108) are divided into two groups and are located on both sides of the pump head (103), and the cavity is divided into a first cavity (106) and a second cavity (110) by the check valves (108).

3. The negative pressure automatic water discharger according to claim 1, characterized in that: A camshaft (111) is disposed in the middle of the pump head (103), and the camshaft (111) is connected to the spline shaft (102) so that the output shaft of the pump body (101) is driven by the spline shaft (102) to rotate the camshaft (111). Piston rods (109) are disposed on both sides of the upper end of the camshaft (111), and the piston rods (109) reciprocate up and down along the middle of the pump head (103).

4. The negative pressure automatic water discharger according to claim 2, characterized in that: The check valve (108) is composed of a movable end (108A), a return spring (108B) and a fixed end (108C); the fixed end (108C) is installed on one side of the pump head (103); the movable end (108A) is slidably connected to the fixed end (108C) via the return spring (108B).

5. The negative pressure automatic water discharger according to claim 1, characterized in that: The connecting body (201) has a first connecting end (202A) and a second connecting end (202B); water flows from the first connecting end (202A) to the second connecting end (202B) and pushes the sliding body (203) in a direction close to the second connecting end (202B); part of the water flows into the water storage area through the water storage port (206); and when the thrust of the water flow decreases, the water in the water storage area is discharged from the second connecting end (202B).

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