CN221195349U - Hydraulic diaphragm type filling pump suitable for mine filling - Google Patents

Abstract

The utility model discloses a hydraulic diaphragm type filling pump suitable for mine filling paste. The diaphragm chambers are arranged side by side, the top of each diaphragm chamber is respectively connected with a hydraulic driving cone valve as a feeding valve, and the bottom of each diaphragm chamber is respectively connected with a straight-through cone valve as a discharging valve, so that a feeding system of a conventional diaphragm pump is omitted. The hydraulic oil driving device can sequentially drive hydraulic oil to act on the rubber diaphragms of the diaphragm chambers, so that the feeding valves connected with the diaphragm chambers are closed when being opened to suck paste, and the discharging valves are opened when the suction valves are closed to discharge paste. All the outlets of the discharging valves are connected to the discharging main pipe, and the paste flows with stable flow are ensured in the discharging main pipe of the filling pump by sequentially discharging materials to the discharging main pipe through a plurality of diaphragm chambers.

Description

A hydraulic diaphragm filling pump suitable for mine filling

Technical Field

The utility model belongs to the field of mining, in particular to a hydraulic diaphragm filling pump suitable for mine filling.

Background technique

The booster pump used for mine filling is mostly a paste filling pump. The paste filling pump is developed on the basis of the concrete pump of the construction project. It uses hydraulic oil as the working medium and uses the motor to drive the hydraulic cylinder to drive the piston or valve to push the material out. It is a kind of reciprocating positive displacement pump. Its working principle is as follows: the power is transmitted to the hydraulic pump through the motor. The pressure oil generated by the hydraulic pump drives the cylinder to drive the pistons in the two conveying cylinders to produce alternating reciprocating motion. The distribution valve (S-tube swing valve or cone valve) is used to make the piston retreat to suck the slurry from the hopper, and the piston moves forward to press the slurry into the conveying pipe.

Conventional filling pumps have the following common design problems:

(1) Because there is a dead time between the two hydraulic cylinders during the reversing process, the movement of the filling slurry in the filling pipe is intermittent, which can easily lead to pipe blockage accidents in low temperature environments. At the same time, the slurry will have different degrees of reflux during the reversing process;

(2) Due to the sudden change in speed during the reversing process of the hydraulic cylinder, under the action of the capacitance and inertia of the slurry, a large water hammer effect occurs in the filling pipe during the reversing process, which affects the life of the filling pipe, valve and seal;

(3) Since the delivery cylinder of the filling pump is arranged horizontally, its volumetric efficiency is generally below 90%, and the working efficiency is limited.

Utility Model Content

The main purpose of the utility model is to provide a hydraulic diaphragm filling pump which can continuously and stably convey filling paste.

The hydraulic diaphragm filling pump suitable for filling paste in mines provided by the utility model adopts the following technical scheme: it includes a diaphragm chamber and a hydraulic oil driving device. There are multiple diaphragm chambers arranged side by side, and the top of each diaphragm chamber is respectively connected to a hydraulically driven cone valve as a feed valve, and the bottom is respectively connected to a straight-through cone valve as a discharge valve; the hydraulic oil driving device can sequentially drive the hydraulic oil to act on the rubber diaphragm of each diaphragm chamber, and when the feed valve is opened, the discharge valve is closed to suck the paste, and when the feed valve is closed, the discharge valve is opened to discharge the paste; the outlets of all the discharge valves are connected to the discharge main pipe, and the filling pipeline is continuously supplied with material through the discharge main pipe.

In one implementation of the above technical solution, the feed valve has three sets, each set includes a valve body, a hydraulic cylinder, a valve core, a wear-resistant ring, a feed pipe and a valve seat, the feed pipe and the hydraulic cylinder are respectively connected to the left and right sides of the valve body, the conical valve core is connected to the piston rod end of the hydraulic cylinder, the wear-resistant ring is arranged at the feed pipe connection of the valve body, the wear-resistant ring and the hydraulic cylinder are arranged in the center, the outer diameter of the valve core is larger than the inner diameter of the wear-resistant ring, the valve seat is connected to the bottom of the valve body, and a discharge channel is provided.

In one embodiment of the above technical solution, the valve core includes a fixed cone head, a cone pressure head and an annular clamp block. The fixed cone head is fixed to the piston rod end of the hydraulic cylinder with the flat surface facing backward and the cone surface facing forward. The cone pressure head is connected to the front side of the fixed cone head through fasteners with the cone surface facing backward and the flat surface facing forward. There is a groove between the fixed cone head and the cone pressure head for installing the annular clamp block.

In one implementation of the above technical solution, the outer diameter of the valve core is greater than the inner diameter of the wear-resistant ring.

In one implementation of the above technical solution, the feed pipe of each feed valve is connected to the rectangular bottom plate of the feed hopper, and the valve seat is connected to the top of the diaphragm chamber.

In one implementation of the above technical solution, the hydraulic oil drive device includes a motor, a reduction box, a crankcase, a piston and a hydraulic oil pipe. The motor, the reduction box and the crankcase are connected in sequence. Three cranks with a phase difference of 120 degrees are connected to the crankshaft of the crankcase. Each crank is connected to a connecting rod, each connecting rod is connected to a crosshead, each crosshead extends out of the box and is connected to a piston, and each piston is equipped with a hydraulic oil pipe.

In one implementation of the above technical solution, the hydraulic oil pipe is fixed to the outside of the rubber diaphragm of the diaphragm chamber through a bell cover.

In one implementation of the above technical solution, each rubber diaphragm is vertically connected to a guide rod at the center position, the guide rod is inserted along the axial center of the front end of the hydraulic oil pipe, and each piston is inserted into the rear end of each hydraulic oil pipe.

In one implementation of the above technical solution, a travel switch for monitoring the position of the guide rod is installed on the hydraulic oil pipe.

In one implementation of the above technical solution, the cone valve core of the discharge valve is supported by a spring.

The utility model is provided with a plurality of diaphragm chambers, each of which adopts the method of top feeding and bottom discharging, thereby eliminating the feeding system of a conventional diaphragm pump. The hydraulic oil driving device can sequentially drive the hydraulic oil to act on the rubber diaphragms of each diaphragm chamber, so that when the feed valve connected to each diaphragm chamber is opened, the discharge valve is closed to suck the paste, and when the feed valve is closed, the discharge valve is opened to discharge the paste. The plurality of diaphragm chambers are sequentially discharged to the discharge main pipe to ensure that there is a paste flow with a stable flow rate in the discharge main pipe of the filling pump.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the main structure of an embodiment of the utility model.

FIG. 2 is a schematic diagram of the structure of FIG. 1 from above.

FIG. 3 is a schematic diagram of the left-side structure of FIG. 1 .

FIG. 4 is a schematic diagram of the isometric structure of this embodiment.

FIG5 is a schematic cross-sectional view of the feed valve in this embodiment.

FIG6 is a simplified structural diagram of a set of crank slider mechanisms, hydraulic oil pipes and diaphragm chambers in this embodiment (the diaphragm chamber is in a state where feeding is completed and discharging is started).

FIG. 7 is a schematic diagram of the diaphragm chamber in this embodiment when the discharge is completed and the feeding state is entered.

Detailed ways

As can be seen from Figures 1 to 4, the hydraulic diaphragm filling pump suitable for mine filling disclosed in this embodiment includes an equipment base 1, a discharge main pipe 2, a discharge valve 3, a diaphragm chamber 4, a feed valve 5, a feed hopper 6, a hydraulic oil pipe 7, a piston assembly 8, a crankcase 9, a reduction box 10, and a motor 11.

There are three sets of feed valves 5 and three diaphragm chambers 4 . The top of each diaphragm chamber 4 is respectively connected to a set of feed valves 5 . The three sets of feed valves 5 are fed through a feed hopper 6 .

The bottom of each diaphragm chamber 4 is respectively connected to a set of discharge valves 3, which adopt a straight-through cone valve structure, and its valve core 31 is supported by a spring. When the diaphragm chamber is in the feeding state, the valve core closes the discharge port, and when the diaphragm chamber is in the discharging state, the valve core opens the discharge port.

The outlets of the three sets of discharge valves 3 are all connected to the discharge main pipe 2 .

As shown in FIG. 5 , the feed valve 5 is a hydraulically driven cone valve, including a valve body and a hydraulic cylinder 51 connected thereto, a sealing ring 52 , a valve core 53 , a wear-resistant ring 54 , a feed pipe 55 and a valve seat 56 .

The valve core 53 includes a fixed cone head 531, a cone pressure head 532 and an annular clamp block 533. The fixed cone head 531 is fixed to the piston rod end of the hydraulic cylinder 51 with the flat surface facing backward and the cone surface facing forward. The cone pressure head 532 is connected to the rear side of the fixed cone head by a countersunk screw with the cone surface facing backward and the flat surface facing forward. There is a groove between the fixed cone head and the cone pressure head for installing the annular clamp block.

The hydraulic cylinder 51 and the feed pipe 55 are respectively connected to the left and right sides of the valve body. The wear-resistant ring 54 is arranged at the feed pipe connection of the valve body. The wear-resistant ring 54 and the hydraulic cylinder 51 are arranged in the center. The outer diameter of the valve core 53 is larger than the inner diameter of the wear-resistant ring 54. The valve seat 56 is connected to the bottom of the valve body and is provided with a discharge channel.

As shown in FIG5 , the bottom plate of the feed hopper 6 is a rectangular plate with three circular holes evenly distributed along the length direction. The upper end of the feed pipe 55 of each feed valve 5 is fixed to each circular hole by a flange and screws.

The ends of the valve seats 56 of the feed valves 5 are connected to the tops of the diaphragm chambers 4 through flanges and screws.

The working principle of the feed valve 5 is as follows:

When the hydraulic cylinder 51 works to extend its piston rod, the valve core 53 at the end of the piston rod can press the wear-resistant ring 54 to close the outlet of the feed pipe 55, preventing the slurry from entering the valve body. When the piston rod retracts, the feed port of the feed pipe 55 opens, the slurry enters the valve body, and enters the diaphragm chamber 4 from the outlet channel of the valve seat 56.

The initial state of the feed valve 5 is: the valve core 53 closes the feed port of the feed pipe 55 (the piston rod of the hydraulic cylinder 51 is in the maximum stroke state).

Since three sets of matching feed valves 5 and diaphragm chambers 4 are provided in this embodiment, three sets of crank-connecting rod mechanisms are connected to the crankshaft in the crankcase 9, and each crank-connecting rod mechanism is respectively connected to a set of piston assemblies 8, and hydraulic oil pipes 7 are respectively provided between each piston assembly and each diaphragm chamber 4.

FIG6 shows a schematic diagram of the structure of one set of crank mechanisms, piston assemblies, hydraulic oil pipes and diaphragm chambers. The crank mechanism includes a crank 91, a connecting rod 92 and a crosshead 93 connected in sequence, and the crank 91 is connected to the crankshaft 90. One end of the hydraulic oil pipe 7 is a bell cover, which is fixed to the outside of the rubber diaphragm of the diaphragm chamber 4. The guide rod 71 vertically connected at the center of the rubber diaphragm is inserted along the axial center front end of the hydraulic oil pipe 7, and the piston of the piston assembly 8 is inserted into the rear end of the hydraulic oil pipe 7. Two travel switches are installed on the guide rod insertion section of the hydraulic oil pipe 7 to monitor the maximum and minimum travel of the guide rod.

In order to ensure that the filling pump can output a stable slurry flow, the phase difference between the three sets of crank-connecting rod mechanisms is 120°.

Combining FIG6 and FIG7, it can be seen that a working process unit of the filling pump is as follows:

The motor 11 drives the crankcase 9 through the reducer 10, so that the rotational motion of the crankshaft in the crankcase is converted into the back-and-forth reciprocating motion of each crosshead 903, thereby driving the piston of each piston assembly 8 to reciprocate back and forth.

When the piston moves backward, negative pressure is formed inside the hydraulic oil pipe 7, pulling the rubber diaphragm of the diaphragm chamber 4 backward, increasing the volume of the working chamber of the diaphragm chamber, and at the same time, the feed port of the feed valve 5 opens to feed (the piston rod of the hydraulic oil cylinder retracts);

The slurry to be transported flows from the feed hopper 6 into the diaphragm chamber 4 after passing through the feed valve until the entire working cavity of the diaphragm chamber is filled, and the travel of the guide rod reaches the maximum (the rubber diaphragm moves backward to the limit position), triggering the travel switch 72 at the rear end of the hydraulic oil pipe 7;

The piston rod of the hydraulic cylinder 51 of the feed valve 5 extends to close the feed port of the feed pipe 55, and the diaphragm chamber 4 enters the discharge state;

The motor works in reverse, causing the piston of the piston assembly 8 to move forward, squeezing the rubber diaphragm forward through the hydraulic oil, and pressing the valve core of the discharge valve 3 downward through pressure (the spring on the lower side of the valve core is compressed), so that the valve core of the discharge valve opens to discharge the material, until the end of the guide rod 71 triggers the travel switch at the front end of the hydraulic oil pipe 7 (the rubber diaphragm moves forward to the limit position), and the discharge is completed. The discharge valve loses pressure and resets under the action of the restoring force of the spring to close the outlet of the diaphragm chamber 4.

Since the three diaphragm chambers can realize discharging in sequence front and back, and the outlet of the discharging valve at the bottom of each diaphragm chamber is connected to a discharging main pipe, the filling pump can continuously transport the filling slurry into the filling pipe.

From the above structure and working process of the filling pump, it can be seen that the filling pump has the following advantages:

Each diaphragm chamber adopts the structure of upper feeding and lower discharging. Multiple diaphragm chambers convey the paste to the main discharging pipe in turn, maintaining the continuity of the paste and avoiding the occurrence of pipe blockage. It also eliminates the feeding system of the conventional diaphragm pump;

The upper feeding structure adopts a cylinder-driven cone valve structure, which replaces the one-way spring return cone valve of the conventional diaphragm pump, so that the feeding does not need to overcome the spring preload pressure, the feeding is smoother and the working efficiency is higher;

A straight-through cone valve structure is adopted for the lower discharge structure, which avoids the clogging problem of high-concentration slurry in the conventional cone valve structure.

Claims (10)

1. A hydraulic diaphragm filling pump suitable for filling paste in mines, comprising a diaphragm chamber and a hydraulic oil driving device, characterized in that: There are multiple diaphragm chambers arranged side by side, and the top of each diaphragm chamber is connected to a hydraulically driven cone valve as a feed valve, and the bottom is connected to a straight-through cone valve as a discharge valve; The hydraulic oil driving device can sequentially drive the hydraulic oil to act on the rubber diaphragms of each diaphragm chamber, close the discharge valve when the feed valve is opened, and suck in the paste, and open the discharge valve when the feed valve is closed to discharge the paste; The outlets of all discharge valves are connected to the discharge main pipe, through which the filling pipeline is continuously supplied with material. 2. The hydraulic diaphragm filling pump suitable for mine filling paste as described in claim 1 is characterized in that: the feed valve has three sets, each set includes a valve body, a hydraulic cylinder, a valve core, a wear-resistant ring, a feed pipe and a valve seat, the feed pipe and the hydraulic cylinder are respectively connected to the left and right sides of the valve body, the conical valve core is connected to the piston rod end of the hydraulic cylinder, the wear-resistant ring is arranged at the feed pipe connection of the valve body, the wear-resistant ring and the hydraulic cylinder are arranged in the center, the outer diameter of the valve core is larger than the inner diameter of the wear-resistant ring, the valve seat is connected to the bottom of the valve body, and a discharge channel is provided. 3. The hydraulic diaphragm filling pump suitable for mine filling paste as described in claim 2 is characterized in that: the valve core includes a fixed cone head, a cone pressure head and an annular clamp block, the fixed cone head is fixed to the piston rod end of the hydraulic cylinder with the flat surface facing backward and the cone surface facing forward, the cone pressure head is connected to the front side of the fixed cone head through fasteners with the cone surface facing backward and the flat surface facing forward, and there is a groove between the fixed cone head and the cone pressure head for installing the annular clamp block. 4. The hydraulic diaphragm filling pump suitable for mine filling paste as claimed in claim 2, characterized in that the outer diameter of the valve core is larger than the inner diameter of the wear-resistant ring. 5. The hydraulic diaphragm filling pump suitable for mine filling paste as described in claim 2 is characterized in that the feed pipe of each feed valve is connected to the rectangular bottom plate of the feed hopper, and the valve seat is connected to the top of the diaphragm chamber. 6. The hydraulic diaphragm filling pump suitable for mine filling paste as described in claim 2 is characterized in that: the hydraulic oil drive device includes a motor, a reduction box, a crankcase, a piston and a hydraulic oil pipe, the motor, the reduction box and the crankcase are connected in sequence, and three cranks with a phase difference of 120 degrees are connected to the crankshaft in the crankcase, each crank is respectively connected to a connecting rod, each connecting rod is respectively connected to a crosshead, each crosshead extends out of the box and is respectively connected to a piston, and each piston is respectively equipped with a hydraulic oil pipe. 7. The hydraulic diaphragm filling pump suitable for mine filling paste as described in claim 6 is characterized in that the hydraulic oil pipe is fixed to the outside of the rubber diaphragm of the diaphragm chamber through a trumpet cover. 8. The hydraulic diaphragm filling pump suitable for mine filling paste as described in claim 7 is characterized in that: a guide rod is vertically connected to the center position of each rubber diaphragm, the guide rod is inserted along the axial center of the front end of the hydraulic oil pipe, and each piston is inserted into the rear end of each hydraulic oil pipe. 9. The hydraulic diaphragm filling pump suitable for mine filling paste as claimed in claim 8, characterized in that a travel switch for monitoring the position of the guide rod is installed on the hydraulic oil pipe. 10. The hydraulic diaphragm filling pump suitable for mine filling paste according to claim 1, characterized in that the cone valve core of the discharge valve is supported by a spring.