Driving system of tower-type water-cooled fire grate for biomass gasification furnace

Abstract

The utility model belongs to the technical field of biomass gasification deslagging mechanical equipment, and particularly relates to a driving system of a tower-type water-cooled fire grate for a biomass gasification furnace, which comprises a ratchet wheel fixedly connected to the bottom of an ash basin, a supporting platform for supporting the ash basin and a hydraulic push rod for driving the ratchet wheel to rotate, the hydraulic push rod comprises a hydraulic cylinder fixedly connected to the supporting platform, a push arm with one end slidably connected into the hydraulic cylinder and a roller rotationally connected to the other end of the push arm, and the axis of the roller is perpendicular to the plane of the ratchet wheel. Due to the fact that the pin rollers are arranged and can rotate, abrasion generated when the push arm pushes the ratchet wheel is greatly reduced compared with sliding friction, abrasion between the ratchet wheel and the hydraulic push rod can be greatly reduced, compared with an existing driving system, the driving system is longer in service life, and labor cost of regular maintenance and overhaul is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass gasification slag discharging mechanical equipment, in particular to a tower-type water-cooling grate driving system for a biomass gasifier. Background Art

[0002] Biomass gasification is a process that uses air, oxygen-enriched air, air and water vapor, oxygen and water vapor, etc. as gasifying agents to convert biofuels into fuel gas through thermochemical reactions under high temperature conditions. The gasification process can convert solid biofuels into easy-to-use gaseous fuels, transfer the chemical energy of the fuel to the fuel gas, and the conversion efficiency reaches 70-90%, so it is a highly efficient conversion method.

[0003] The biomass gasifier consists of a drying layer, a pyrolysis layer, a reduction layer, and an oxidation layer from top to bottom. The biofuel is added from the top and moves slowly downward, and the fuel bed is supported on the grate; the gasifier enters from the bottom of the grate, passes through each reaction layer upward, and the fuel gas is discharged from the top.

[0004] At present, the main driving method for the rotation of the grate and the ash basin is to set a gear or a gear ring at the bottom of the ash basin and drive it with a worm gear. Some also use a ratchet plus a hydraulic push rod, that is, the hydraulic push rod directly pushes the tooth groove of the ratchet, but this causes greater wear on the push rod and a short service life.

[0005] Therefore, the present application proposes a driving system for a tower water-cooled grate of a biomass gasifier with low wear. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a driving system for a tower water-cooled grate of a biomass gasifier, which solves the problem of greater wear of the existing driving method of ratchet plus hydraulic push rod.

[0007] To achieve the above purpose, the utility model provides the following technical solutions: a driving system for a tower water-cooled grate of a biomass gasifier, comprising a ratchet fixedly connected to the bottom of an ash basin, a supporting platform for supporting the ash basin, and a hydraulic push rod for driving the ratchet to rotate, wherein the hydraulic push rod comprises:

[0008] A hydraulic cylinder is fixedly connected to the supporting platform;

[0009] A push arm, one end of which is slidably connected to the hydraulic cylinder, and the other end of which is rotatably connected to a roller whose axis is perpendicular to the plane of the ratchet.

[0010] Preferably, the tooth grooves of the ratchet are arc-shaped.

[0011] Preferably, a side of the push arm facing the ratchet is provided with an avoidance position.

[0012] Preferably, it further comprises a fixing seat fixedly connected to the supporting platform, the hydraulic cylinder is fixedly mounted on the fixing seat, and the fixing seat is provided with a supporting structure for supporting the extended end of the push arm.

[0013] Preferably, a travel switch is also provided on the fixing seat.

[0014] Preferably, it also includes a control unit and an oil injection pump, the input end of the travel switch is electrically connected to the input end of the control unit, the output end of the control unit is controllably connected to the output end of the oil injection pump, and the oil injection pump and the hydraulic cylinder are connected via a hydraulic pipe.

[0015] Preferably, the hydraulic push rods include at least two and are centrally symmetrically distributed about the rotation axis of the ratchet wheel.

[0016] Preferably, the starting positions of all the hydraulic push rods are the same.

[0017] Compared with the prior art, the utility model provides a driving system for a tower water-cooled grate of a biomass gasifier, which has the following beneficial effects:

[0018] The drive system of the tower water-cooled grate of the biomass gasifier is provided with rollers. Since the rollers themselves can rotate, the wear when the push arm pushes the ratchet is greatly reduced compared with the sliding friction. Therefore, the wear of the ratchet and the hydraulic push rod can be greatly reduced. Compared with the existing drive system, it has a longer service life and greatly reduces the labor cost of regular maintenance and overhaul. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural front view of a driving system for a tower-type water-cooled grate of a biomass gasifier;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 Schematic diagram of the three-dimensional structure of the ratchet in the driving system of the tower water-cooled grate used in the biomass gasification furnace;

[0022] Figure 4 This is the enlarged view of point B in 3;

[0023] Figure 5 This is a control flow chart of the drive system of the tower water-cooled grate used in the biomass gasifier.

[0024] In the figure: 1. ash basin; 2. ratchet; 21. tooth groove; 22. teeth; 3. support platform; 4. hydraulic push rod; 41. hydraulic cylinder; 42. push arm; 43. roller; 5. fixed seat; 6. travel switch; 7. control unit; 8. oil injection pump; 9. hydraulic pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4 The utility model provides the following technical solutions: a driving system for a tower water-cooled grate of a biomass gasifier, comprising a ratchet 2 fixedly connected to the bottom of an ash basin 1, a supporting platform 3 for supporting the ash basin 1, and a hydraulic push rod 4 for driving the ratchet 2 to rotate, the hydraulic push rod 4 comprising a hydraulic cylinder 41 fixedly connected to the supporting platform 3, a push arm 42 at one end slidably connected to the hydraulic cylinder 41, and a roller 43 rotatably connected to the other end of the push arm 42, the axis of the roller 43 being perpendicular to the plane of the ratchet 2.

[0027] As an optional implementation scheme of the present invention, when the hydraulic push rod 4 is extended, the push arm 42 acts on the tooth groove 21 of the ratchet 2, thereby driving the ratchet 2 to rotate. When the roller 43 at the end of the push arm 42 contacts the tooth groove 21, since it can rotate itself, the wear of rolling friction is greatly reduced compared to sliding friction. Therefore, the wear of the ratchet 2 and the hydraulic push rod 4 can be greatly reduced. Compared with the existing drive system, it has a longer service life and greatly reduces the labor cost of regular maintenance and overhaul.

[0028] like Figure 4 As shown, the tooth groove 21 of the ratchet 2 is arc-shaped.

[0029] As an optional implementation scheme of the present invention, the arc-shaped design makes the rolling contact between the tooth groove 21 of the ratchet 2 and the roller 43 smoother and reduces wear.

[0030] Specifically, a side of the push arm 42 facing the ratchet 2 is provided with an avoidance position.

[0031] As an optional implementation scheme of the present invention, the design of the avoidance position can prevent the subsequent teeth 22 from causing lateral force on the side of the push arm 42 when the ratchet 2 rotates, thereby preventing damage to the push arm 42 and also avoiding obstruction of the push arm 42 during the return stroke, thereby ensuring the normal operation of the entire drive system.

[0032] like Figure 2 As shown, it also includes a fixed base 5 fixedly connected to the supporting platform 3, the hydraulic cylinder 41 is fixedly installed on the fixed base 5, and the fixed base 5 is provided with a supporting structure for supporting the extended end of the push arm 42.

[0033] As an optional implementation scheme of the utility model, the support structure can support the push arm 42 to prevent the center of gravity of the push arm 42 from deviating too much after extension, resulting in unstable force on the ratchet 2, and the support structure can also be designed as a structure with a guiding function, such as a slide rail.

[0034] like Figure 4-5 As shown, it also includes a control unit 7 and an oil injection pump 8, the input end of the travel switch 6 is electrically connected to the input end of the control unit 7, the output end of the control unit 7 is control-connected to the output end of the oil injection pump 8, the oil injection pump 8 and the hydraulic cylinder 41 are connected through a hydraulic pipe 9, and a travel switch 6 is also provided on the fixed seat 5.

[0035] As an optional implementation scheme of the utility model, when the push arm 42 is extended, a signal contact is set at a certain point on the extended end thereof, and when passing through the travel switch 6, the travel switch 6 is triggered to generate a stroke in place signal. When the push arm 42 is retracted, a signal contact at a certain point on its rear end triggers the travel switch 6 to generate a return in place signal when passing through the travel switch 6. The control unit 7 adopts a PLC module, and after receiving the above-mentioned electrical signal, it controls the oil injection pump 8 to suck oil or discharge oil into the hydraulic cylinder 41, so that the hydraulic push rod 4 performs continuous reciprocating linear motion, thereby pushing the ratchet 2 to keep rotating.

[0036] The travel switch 6 may also be replaced by a time relay, and the hydraulic push rod 4 automatically switches to another travel action after running for a certain period of time.

[0037] Specifically, the hydraulic push rods 4 include at least two, and are centrally symmetrically distributed about the rotation axis of the ratchet 2 .

[0038] As an optional implementation scheme of the present invention, two centrally symmetrical hydraulic push rods 4 can make the force on the ratchet 2 more balanced.

[0039] Specifically, the starting positions of all hydraulic push rods 4 are the same.

[0040] As an optional implementation scheme of the utility model, the hydraulic push rod 4 with the same starting position has the same extension and retraction states and stroke during operation, so the driving force on the ratchet 2 is very balanced.

[0041] The working principle and use process of the utility model are as follows: when the hydraulic push rod 4 is extended, the push arm 42 acts on the outer side of the tooth groove 21 of the ratchet 2, and the ratchet 2 rotates after being subjected to the force. Since the roller 43 at the end of the push arm 42 can rotate when in contact with the tooth groove 21, the wear caused by rolling friction is greatly reduced compared with sliding friction. Therefore, the wear of the ratchet 2 and the hydraulic push rod 4 can be greatly reduced, and the service life has been longer than that of the existing drive system, and the labor cost of regular maintenance and overhaul is greatly reduced; when the ratchet 2 rotates, the push arm 42 retracts to prevent the subsequent teeth 22 from causing lateral force on the side of the push arm 42, thereby preventing damage to the push arm 42 and also preventing the push arm 42 from being blocked during the return stroke, thereby ensuring the normal operation of the entire drive system.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A driving system for a tower water-cooled grate of a biomass gasifier, comprising a ratchet wheel fixedly connected to the bottom of an ash basin, a supporting platform for supporting the ash basin, and a hydraulic push rod for driving the ratchet wheel to rotate, characterized in that: The hydraulic push rod comprises: A hydraulic cylinder is fixedly connected to the supporting platform; A push arm, one end of which is slidably connected to the hydraulic cylinder, and the other end of which is rotatably connected to a roller whose axis is perpendicular to the plane of the ratchet.

2. The driving system of a tower water-cooled grate for a biomass gasifier according to claim 1, characterized in that: The tooth grooves of the ratchet are arc-shaped.

3. The driving system of a tower water-cooled grate for a biomass gasifier according to claim 1, characterized in that: A side of the push arm facing the ratchet is provided with an avoidance position.

4. The driving system of a tower water-cooled grate for a biomass gasifier according to claim 1, characterized in that: It also includes a fixing seat fixedly connected to the supporting platform, the hydraulic cylinder is fixedly installed on the fixing seat, and the fixing seat is provided with a supporting structure for supporting the extended end of the push arm.

5. The driving system of a tower water-cooled grate for a biomass gasifier according to claim 4, characterized in that: The fixing seat is also provided with a travel switch.

6. A driving system for a tower water-cooled grate of a biomass gasifier according to claim 5, characterized in that: It also includes a control unit and an oil injection pump. The input end of the travel switch is electrically connected to the input end of the control unit, the output end of the control unit is controllably connected to the output end of the oil injection pump, and the oil injection pump is connected to the hydraulic cylinder via a hydraulic pipe.

7. The driving system of a tower water-cooled grate for a biomass gasifier according to claim 4, characterized in that: The hydraulic push rods include at least two and are centrally symmetrically distributed about the rotation axis of the ratchet wheel.

8. The driving system of a tower water-cooled grate for a biomass gasifier according to claim 7, characterized in that: The starting position of all said hydraulic push rods is the same.

Images