Energy storage type hydraulic brake protection system

Abstract

The utility model discloses an energy storage type hydraulic brake protection system, and relates to the technical field of pumping unit brake. A cylindrical piston is connected into the cylinder sleeve in a clearance fit mode through a sealing ring, a compression spring A is installed between the bottom of the cylindrical piston and the cylinder sleeve, a lifting sleeve is installed on the upper portion of the cylindrical piston, two propelling blocks are installed on the two sides of a transverse through hole of the lifting sleeve, an annular capsule is installed between the two propelling blocks in the transverse through hole, and hydraulic oil is filled in the annular capsule. The brake device has the advantages that when the ejector rod touches the bottom face of the brake groove, the ejector rod descends and ejects the one-way valve open, oil pressure continues to push the tubular piston to ascend, the tubular piston ascends to press the annular capsule, the annular capsule pushes the propelling block outwards, and therefore the propelling block abuts against the two side faces in the brake groove, a gap between the brake groove and the brake block is eliminated, and the brake effect is improved. When a primary braking system fails, the flywheel and the counterweight iron do not act, the braking effect is guaranteed, and it is guaranteed that a secondary braking protection system is not damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of pumping unit brakes, in particular to an energy storage type hydraulic braking protection system. Background Technique

[0002] When the pumping unit stops, in order to avoid brake failure, generally after the original brake of the pumping unit is engaged, a secondary brake protection system is added as a protection device to ensure the personal safety of workers. The secondary brake inserts the brake block into the brake groove of the brake disc to achieve fixed braking. The existing brake block is smaller than the brake groove to facilitate insertion into the brake groove. When the brake block is inserted into the brake groove, there is a gap between the brake block and the brake groove, so that the flywheel can rotate an angle when the primary brake fails. The flywheel drives the counterweight to rotate together to generate a huge torque. At this time, the brake block may not be able to stop the flywheel from rotating. Even if the secondary braking is successful, the inertia of the flywheel rotation will impact the secondary braking system. Content of the Utility Model

[0003] In order to solve the problems that the existing secondary braking protection system of the pumping unit is vulnerable to impact and the secondary brake fails, the utility model provides an energy storage type hydraulic braking protection system.

[0004] The technical solution provided by the utility model is: an energy storage type hydraulic braking protection system, including a cylinder sleeve and a brake disc. The outer circle of the brake disc is provided with circumferentially evenly distributed brake grooves. The cylinder sleeve is installed on the pumping unit base, and the cylinder sleeve is arranged vertically. The axis of the cylinder sleeve extends upward and coincides with the vertical axis of the brake disc. A cylindrical piston is connected to the cylinder sleeve through a sealing ring with clearance fit. A compression spring A is installed between the bottom of the cylindrical piston and the cylinder sleeve. A threaded oil inlet interface is provided at the bottom of the cylinder sleeve. A lifting sleeve is installed on the upper part of the cylindrical piston, and the lifting sleeve is connected to the cylinder sleeve with clearance fit. A transverse through hole is opened in the upper part of the lifting sleeve. A through hole B is opened at the center of the top of the lifting sleeve. A counterbore is opened downward from the lower end surface of the transverse through hole of the lifting sleeve. A valve chamber hole is opened on the lower end surface of the lifting sleeve. A through hole A is opened between the valve chamber hole and the counterbore;

[0005] Two push blocks are installed on both sides of the transverse through hole of the lifting sleeve. An annular capsule is installed between the two push blocks in the transverse through hole. The annular capsule is filled with hydraulic oil. The two sides of the annular capsule are bonded to the two push blocks. A push rod is inserted into the through hole B of the lifting sleeve. A tubular piston is connected to the counterbore of the lifting sleeve through a sealing ring with clearance fit. The push rod passes downward through the annular capsule, the tubular piston, and the through hole A. The push rod and the tubular piston are connected through a sealing ring with clearance fit. A valve core, a valve seat, and a compression spring B are installed in the valve chamber hole of the lifting sleeve. The valve chamber hole, the valve core, the valve seat, and the compression spring B form a one-way valve. The lower end of the push rod abuts against the upper part of the valve core. The top of the push rod is higher than the upper end surface of the lifting sleeve;

[0006] The cylindrical piston is provided with a through-flow hole that penetrates up and down, and a through-flow groove is provided in the upper part of the through-flow hole of the cylindrical piston.

[0007] The two pushing blocks are connected by a tension spring.

[0008] Replace "The lifting sleeve installs two pushing blocks on both sides of the transverse through-hole" with "The lifting sleeve installs two groups of pushing blocks on both sides of the transverse through-hole, and each group of pushing blocks includes a number of single pushing blocks stacked up and down."

[0009] In the installed state, the total width of the two pushing blocks is less than the width of the brake groove.

[0010] The beneficial effects of the present utility model are as follows: When the flywheel stops rotating under the action of the original braking system, oil pressure is input through the threaded oil inlet interface. The oil pressure pushes the cylindrical piston and the lifting sleeve to rise. When the ejector rod touches the bottom surface of the brake groove, the ejector rod descends and opens the one-way valve. The oil pressure continues to push the tubular piston to rise. The rising tubular piston compresses the annular capsule, and the annular capsule pushes the pushing block outwards, so as to abut against the two side surfaces in the brake groove, eliminating the gap between the brake groove and the brake block. When the primary braking system fails, the flywheel and the counterweight will not move, ensuring the braking effect and ensuring that the secondary braking protection system is not damaged. When releasing the brake, only need to relieve the oil pressure. The pushing block retracts, and the self-weights of the lifting sleeve and the cylindrical piston compress the compression spring A to descend. The compression spring A stores this potential energy, which can reduce the energy consumption during the next oil pressure lifting. Description of the Drawings

[0011] Attached Figure 1 is a schematic structural diagram of the present utility model;

[0012] Attached Figure 2 The attached Figure 1 is an enlarged view at B of the attached

[0013] Attached Figure 3 is the A-A sectional view of the attached Figure 1 ;

[0014] Attached Figure 4 is a schematic structural diagram of the lifting sleeve in the present utility model.

[0015] In the figure: 1 - cylinder liner, 2 - cylindrical piston, 3 - lifting sleeve, 4 - tubular piston, 5 - ejector rod, 6 - threaded oil inlet interface, 7 - compression spring A, 8 - pushing block, 9 - annular capsule, 10 - brake disc, 11 - brake groove, 12 - tension spring, 13 - valve core, 14 - valve seat, 15 - transverse through-hole, 16 - counterbore, 17 - through-hole A, 18 - valve chamber hole, 19 - compression spring B, 20 - through-flow hole, 21 - through-flow groove, 22 - through-hole B. Detailed Description of the Invention

[0016] As Figures 1 to 4As shown in the figure, an energy storage type hydraulic braking protection system includes a cylinder liner 1 and a brake disc 10. The outer circumference of the brake disc 10 is provided with evenly circumferentially distributed brake grooves 11. The cylinder liner 1 is installed on the pumping unit base. The cylinder liner 1 is arranged vertically, and the axis of the cylinder liner 1 extends upward and coincides with the vertical axis of the brake disc 10. A cylindrical piston 2 is connected to the cylinder liner 1 through a sealing ring with clearance fit. A compression spring A7 is installed between the bottom of the cylindrical piston 2 and the cylinder liner 1. A threaded oil inlet interface 6 is provided at the bottom of the cylinder liner 1. An elevating sleeve 3 is installed on the upper part of the cylindrical piston 2. The elevating sleeve 3 is connected to the cylinder liner 1 with clearance fit. A transverse through hole 15 is opened in the upper part of the elevating sleeve 3. A through hole B22 is opened at the center of the top of the elevating sleeve 3. A counterbore 16 is opened downward at the lower end surface of the transverse through hole 15 of the elevating sleeve 3. A valve chamber hole 18 is opened at the lower end surface of the elevating sleeve 3. A through hole A17 is opened between the valve chamber hole 18 and the counterbore 16;

[0017] Two pushing blocks 8 are installed on both sides of the transverse through hole 15 of the elevating sleeve 3. An annular capsule 9 is installed between the two pushing blocks 8 in the transverse through hole 15. The annular capsule 9 is filled with hydraulic oil. The two sides of the annular capsule 9 are bonded to the two pushing blocks 8. A push rod 5 is inserted into the through hole B22 of the elevating sleeve 3. A tubular piston 4 is connected to the counterbore 16 of the elevating sleeve 3 through a sealing ring with clearance fit. The push rod 5 passes downward through the annular capsule 9, the tubular piston 4, and the through hole A17. The push rod 5 and the tubular piston 4 are connected through a sealing ring with clearance fit. A valve core 13, a valve seat 14, and a compression spring B19 are installed in the valve chamber hole 18 of the elevating sleeve 3. The valve chamber hole 18, the valve core 13, the valve seat 14, and the compression spring B19 form a one-way valve. The lower end of the push rod 5 abuts against the upper part of the valve core 13. The top of the push rod 5 is higher than the upper end surface of the elevating sleeve 3;

[0018] The cylindrical piston 2 is provided with an upper and lower through-flow hole 20. The cylindrical piston 2 is provided with a through-flow groove 21 above the through-flow hole 20.

[0019] During actual use, when the flywheel stops rotating under the action of the original braking system, oil pressure is input through the threaded oil inlet interface 6. The oil pressure pushes the cylindrical piston 2 and the elevating sleeve 3 to rise. When the push rod 5 touches the bottom surface of the brake groove 11, the push rod 5 descends and opens the one-way valve. The oil pressure continues to push the tubular piston 4 to rise. The tubular piston 4 rises and compresses the annular capsule 9. The annular capsule 9 pushes the pushing blocks 8 outward, so as to abut against the two side surfaces in the brake groove 11, eliminating the gap between the brake groove 11 and the brake block. When the primary braking system fails, the flywheel and the counterweight will not move, ensuring the braking effect and ensuring that the secondary braking protection system is not damaged. When releasing the brake, only the oil pressure needs to be relieved. The pushing blocks 8 retract, and the self-weights of the elevating sleeve 3 and the cylindrical piston 2 compress the compression spring A7 to descend. The compression spring A7 stores this potential energy, which can reduce the energy consumption during the next oil pressure lifting.

[0020] The two pushing blocks 8 are connected by a tension spring 12. After the hydraulic pressure is relieved, the tension spring 12 contracts to pull the pushing blocks 8 back to their original positions.

[0021] Installing two pushing blocks 8 on both sides of the transverse through hole 15 of the lifting sleeve 3 is replaced by: installing two groups of pushing blocks 8 on both sides of the transverse through hole 15 of the lifting sleeve 3. Each group of pushing blocks 8 includes a number of single pushing blocks 8 stacked vertically. Arranged in this way, each pushing block 8 can extend in different degrees, adapting to brake grooves 11 of different sizes and shapes, and better compensating for the gap between the pushing blocks 8 and the brake grooves 11.

Claims

1. An energy storage type hydraulic brake protection system, comprising a cylinder sleeve (1) and a brake disc (10), characterized in that: The outer circle of the brake disc (10) is provided with brake grooves (11) evenly distributed around the circumference. The cylinder sleeve (1) is installed on the base of the oil pump. The cylinder sleeve (1) is arranged vertically. The axis of the cylinder sleeve (1) extends upward and coincides with the vertical axis of the brake disc (10). The cylinder sleeve (1) is connected to the cylindrical piston (2) through the gap fit of the sealing ring. A compression spring A (7) is installed between the bottom of the cylindrical piston (2) and the cylinder sleeve (1). A threaded oil inlet interface (6) is provided at the bottom of the cylinder sleeve (1). A lifting sleeve (3) is installed on the upper part of the piston (2). The lifting sleeve (3) is connected with the cylinder sleeve (1) by a clearance fit. A transverse through hole (15) is opened on the upper part of the lifting sleeve (3). A through hole B (22) is opened at the center of the top of the lifting sleeve (3). A countersunk hole (16) is opened downward on the lower end surface of the transverse through hole (15) of the lifting sleeve (3). A valve chamber hole (18) is opened on the lower end surface of the lifting sleeve (3). A through hole A (17) is opened between the valve chamber hole (18) and the countersunk hole (16). The lifting sleeve (3) is provided with two push blocks (8) on both sides of the transverse through hole (15), an annular capsule (9) is provided between the two push blocks (8), the annular capsule (9) is filled with hydraulic oil, both sides of the annular capsule (9) and the two push blocks (8) are bonded together, a push rod (5) is inserted into the through hole B (22) of the lifting sleeve (3), a tubular piston (4) is connected to the counterbore (16) of the lifting sleeve (3) through a sealing ring clearance fit, and the push rod (5) passes downward through the ring The lifting sleeve (3) is provided with a valve core (13), a valve seat (14) and a compression spring B (19). The valve core (13), the valve seat (14) and the compression spring B (19) are installed in the valve chamber hole (18) of the lifting sleeve (3). The valve chamber hole (18), the valve core (13), the valve seat (14) and the compression spring B (19) form a one-way valve. The lower end of the lifting sleeve (5) is pressed against the upper part of the valve core (13), and the top of the lifting sleeve (5) is higher than the upper end surface of the lifting sleeve (3). The cylindrical piston (2) is provided with a flow hole (20) which passes through the cylindrical piston (2) from top to bottom, and a flow groove (21) is provided on the upper part of the flow hole (20).

2. The energy storage hydraulic brake protection system according to claim 1, characterized in that: The two propulsion blocks (8) are connected via a tension spring (12).

3. The energy storage hydraulic brake protection system according to claim 1, characterized in that: The lifting sleeve (3) is replaced by installing two propulsion blocks (8) on both sides of the transverse through hole (15) with two groups of propulsion blocks (8) on both sides of the transverse through hole (15), wherein each group of propulsion blocks (8) includes a plurality of single propulsion blocks (8) stacked up and down.

4. The energy storage hydraulic brake protection system according to claim 1, characterized in that: In the installed state, the total width of the two propulsion blocks (8) is smaller than the width of the brake groove (11).

Images