Impact rod buffer structure

Abstract

The present invention provides a buffer structure for an impact rod, comprising a cylinder bracket for securing a cylinder. A buffer sleeve, which is mounted on the cylinder bracket and sleeved around the piston rod, is fixed to the cylinder bracket. A spring is sleeved around the piston rod between a retaining ring mounted on the buffer sleeve and an annular protrusion mounted on the piston rod behind the retaining ring. In this embodiment, the buffer sleeve prevents the piston rod from striking the front end of the cylinder body during a no-load collision, effectively preventing damage to the cylinder caused by such a collision.

Description

Technical Field

[0001] The present invention relates to the field of protective devices, and in particular to a buffer structure of an impact rod. Background Art

[0002] Impact rods are commonly used in industrial production, where a piston rod is used to produce a striking effect through a cylinder or other structure. For example, in the boiler industry, impact rods are used to strike the furnace wall to clean coke deposits.

[0003] The impact rod structure in the prior art has no buffer device when striking, and the piston rod or the striking object is easily damaged during the rigid striking process of the piston rod. Moreover, when there is no striking object in the forward direction of the piston rod, the piston rod will hit the air. After the piston rod hits the air, its huge inertia force will be borne by the cylinder, so the cylinder body is easily damaged and there is a safety hazard. Summary of the Invention

[0004] The object of the present invention is to provide a buffer structure of an impact rod capable of alleviating the inertia force of the impact rod after an empty collision.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted is: a buffer structure of the impact rod, including a cylinder bracket for fixing the cylinder, a buffer sleeve fixedly arranged on the cylinder bracket and sleeved on the piston rod, a retaining ring is arranged on the buffer sleeve, and an annular protrusion is arranged on the piston rod behind the retaining ring, and the distance between the retaining ring and the annular protrusion is smaller than the distance between the cylinder piston and its front end cover.

[0006] In the above solution, the buffer sleeve is provided to prevent the piston rod from hitting the front end cylinder cover of the cylinder body when it hits the cylinder, thereby effectively avoiding damage to the cylinder caused by the hit. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 、 2 , 3, and 4 are structural cross-sectional views of the present invention. DETAILED DESCRIPTION

[0008] A buffer structure for an impact rod includes a cylinder bracket 10 for fixing a cylinder 30. A buffer sleeve 40 is fixedly mounted on the cylinder bracket 10 and sleeved on the piston rod 32. A retaining ring 42 is mounted on the buffer sleeve 40. An annular protrusion 321 is mounted on the piston rod 32 behind the retaining ring 42. The distance between the retaining ring 42 and the annular protrusion 321 is smaller than the distance between the cylinder piston and its front end cover. In this way, when an air kick occurs, the annular protrusion 321 will contact the retaining ring 42 before the cylinder piston impacts its front end cover. The retaining ring 42 then bears the impact force generated by the air kick, preventing damage to the cylinder front end cover.

[0009] An annular step is provided on the piston rod 32 in front of the retaining ring 42. The distance between the retaining ring 42 and the annular step is smaller than the distance between the cylinder piston and its rear end cover. In this way, when the piston rod 32 returns, the annular step will contact the retaining ring 42 before the cylinder piston impacts the rear end cover. The retaining ring 42 then bears the impact force generated by the return of the piston rod 32, thus preventing damage to the rear end cover of the cylinder.

[0010] A retaining ring 42 is provided at each end of the interior of the buffer sleeve 40. A spring 43 is sleeved on the piston rod 32 between the two retaining rings 42. When the spring 43 is compressed to its minimum, the cylinder piston is spaced apart from its front and rear end caps. In the above scheme, when the piston rod 32 reaches its designed stroke, the annular raised cylindrical body 321 thereon first strikes the retaining ring 42 and spring 43 within the buffer sleeve 40. The spring 43, when compressed, generates an elastic force to offset the inertial force of the piston rod 32. The other structure that bears the elastic force of the spring 43 is the cylinder bracket 10 fixed to the buffer sleeve 40. Its structural strength is high and not easily damaged. Moreover, when the spring 43 is compressed to its minimum, the piston still does not strike the cylinder end cap.

[0011] The cylinder support 10 is a square or round tube structure that is sleeved onto the outside of the cylinder 30. The end flange of the cylinder support 10 through which the piston rod 32 passes is connected to a buffer sleeve 40. This facilitates the manufacture and installation of the buffer sleeve 40. Since the piston rod 32 is generally long, in order to provide a longer piston rod 32 to increase its mass and improve its striking impulse, a portion of the piston rod 32 that has been retracted into place may still be located outside the cylinder body. To protect this portion, the present invention provides a cylinder support 10 with a square or round tube structure. The entire cylinder can be placed within the cylinder support, thereby protecting it when not in use. The length of the cylinder support 10 is generally designed to match the overall length of the cylinder 30 in the retracted state.

[0012] One end of the buffer sleeve 40 is connected to the cylinder bracket 10. Through-holes 411 are provided on the end plates 41 at both ends of the buffer sleeve 40. Retaining rings 42 are arranged on the inner surfaces of the two end plates 41. The outer circumference of retaining ring 42 is larger than the diameter of through-hole 411, and the inner diameter of retaining ring 42 is smaller than the diameter of through-hole 411. The two ends of a spring 43 disposed within the buffer sleeve 40 respectively abut against retaining ring 42. The configuration of the buffer sleeve 40 ensures that in the two extreme positions (i.e., when the piston rod 32 is extended or retracted to the extremes), the spring retaining rings limit the travel distance of the piston rod, providing a position-limiting, buffering, and protective function, preventing the piston from striking the cylinder end cover.

[0013] The outer circumference of the annular step and annular protrusion 321 is smaller than the diameter of the end plate through-hole 411, and the outer circumference of the step is larger than the inner hole of the retaining ring 42. One protrusion 321 is positioned near the end of the piston rod 32, and the spacing between the two protrusions 321 corresponds to the piston's stroke. For example, when the piston rod 32 is extended and the piston is about to approach the cylinder front end cover, the cylindrical body of the protrusion 321 first contacts the spring retaining ring 42 installed in the buffer sleeve. Under the buffering action of the compression spring 43, the speed of the piston rod 32 is reduced, significantly alleviating the impact of the piston on the cylinder front end cover, and vice versa.

[0014] A cleaning brush ring 44 is provided at the outer end of the buffer sleeve 40. A cleaning brush ring 44 is provided at the outer end of the buffer sleeve 40. The cleaning brush ring 44 is used to remove the coke ash stuck to the piston rod 32 in the furnace wall to prevent the coke ash from accumulating and clogging the pipe body 22.

[0015] like Figure 2 The cleaning brush ring 44 is an annular brush that is helpful for cleaning fine granular coke ash.

[0016] like Figure 3 The cleaning brush ring 44 is an annular brush shovel with a shovel mouth facing outwards. The brush shovel helps to clean the impurities attached to the piston rod 32.

[0017] The buffer device is used to reduce the impact force on the front end cover of the cylinder. It has a small size, a simple and reasonable structure, high buffering efficiency, a fast return speed, and is safe and reliable to use.

Claims

1. A buffer structure for an impact rod, characterized in that: The invention comprises a cylinder support (10) for fixing the cylinder (30), a buffer sleeve (40) sleeved on the piston rod (32) is fixedly provided on the cylinder support (10), a retaining ring (42) is provided on the buffer sleeve (40), an annular protrusion (321) is provided on the piston rod (32) behind the retaining ring (42), and the distance between the retaining ring (42) and the annular protrusion (321) is smaller than the distance between the cylinder piston and its front end cover; an annular step is provided on the piston rod (32) in front of the retaining ring (42), and the distance between the retaining ring (42) and the annular step is smaller than the distance between the cylinder piston and its rear end cover; When the piston rod (32) extends out of the cylinder body, the annular protrusion (321) and the retaining ring (42) are spaced apart and the spacing gradually decreases; when the piston rod (32) retracts into the cylinder body, the annular step and the retaining ring (42) are spaced apart and the spacing gradually decreases; The retaining ring (42) is provided at each end of the interior of the buffer sleeve (40), and a spring (43) is provided on the rod of the piston rod (32) between the two retaining rings (42). When the spring (43) is compressed to the minimum, there is a gap between the cylinder piston and its front and rear end covers; one end of the buffer sleeve (40) is connected to the cylinder bracket (10), and the end plates (41) at both ends of the buffer sleeve (40) are provided with through holes (411), and retaining rings are arranged on the inner plate surfaces of the two end plates (41). (42), the outer circumference of the retaining ring (42) is larger than the aperture of the through hole (411) and the inner hole of the retaining ring (42) is smaller than the aperture of the through hole (411), and the two ends of the spring (43) provided in the buffer sleeve (40) respectively abut against the retaining ring (42); the outer circumference of the annular step and the annular protrusion (321) is smaller than the aperture of the end plate through hole (411), and the outer circumference of the annular step and the annular protrusion (321) is larger than the inner hole of the retaining ring (42).

2. The buffer structure of the impact rod according to claim 1, characterized in that The cylinder bracket (10) is a square tube or round tube structure sleeved on the outside of the cylinder body (30), and the pipe end flange of the cylinder bracket (10) through which the piston rod (32) passes is connected to a buffer sleeve (40).

3. The buffer structure of the impact rod according to claim 1, characterized in that: A cleaning brush ring (44) is provided at the outer end of the buffer sleeve (40).

4. The buffer structure of the impact rod according to claim 3, characterized in that: The cleaning brush ring (44) is an annular brush.

5. The buffer structure of the impact rod according to claim 3, characterized in that: The cleaning brush ring (44) is an annular brush shovel with the shovel mouth facing outward.

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