CN-117189536-B - Slurry separation structure and plunger pulp pump

Abstract

The invention relates to the field of plunger pumps, and discloses a slurry separation structure and a plunger pulp pump. The side end of the upper part of the pump body is provided with a plunger channel communicated with the medium oscillation cavity, the plunger channel is connected with a stuffing box, a plunger capable of transversely reciprocating in the plunger channel is arranged in the stuffing box, and the honeycomb duct is positioned outside the moving range of the plunger. The invention can separate slurry medium, effectively avoid full turbulence of back flushing medium and slurry medium, and the plunger can be detached from the front end of the pump body for maintenance, effectively shorten the size of the pump body due to the existence of the turbulence isolating ring, improve the reliability and maintenance of the pump, reduce the manufacturing cost and prolong the service life of spare parts.

Inventors

• ZHANG SHUNPING
• WANG LEI
• LI KUI
• TAN PING
• ZHU ZHONGYU
• WANG WENWEN
• CHEN WEI

Assignees

• 重庆水泵厂有限责任公司

Dates

Publication Date

20260508

Application Date

20231025

Claims (9)

1. 1. The plunger pulp pump is characterized in that an upper limit ring is arranged at the upper section of the guide pipe, a lower limit ring is arranged above a medium inlet at the bottom of the guide pipe, a separation ring is sleeved in the middle of the guide pipe, an upper elastic support member is sleeved on the guide pipe between the separation ring and the upper limit ring, the separation ring is limited below the plunger channel by the upper elastic support member, and a lower elastic support member is sleeved on the guide pipe between the separation ring and the lower limit ring; The plunger channel is transversely arranged on the pump body, the plunger channel is intersected with the medium oscillation cavity locally, the plunger channel penetrates through the pump body, the plunger and the guide pipe are distributed in a staggered mode, the guide pipe cannot limit the movement range of the plunger, the rear dead center of the plunger can move forward into the pump body, the plunger channel is connected with a stuffing box, the stuffing box is internally provided with the plunger capable of transversely reciprocating in the plunger channel, and the guide pipe is located outside the movement range of the plunger.
2. 2. The plunger pulp pump of claim 1, wherein the outer side wall of the upper section of the isolating ring is inclined to the axis to form a conical surface.
3. 3. The plunger pulp pump mechanism of claim 2, wherein a gap is arranged between the outer side wall of the isolating ring and the inner wall of the medium oscillation cavity.
4. 4. A plunger pulp pump as in claim 3, wherein said upper and lower resilient supports are springs.
5. 5. The plunger pulp pump of claim 1, wherein the plunger channel transversely penetrates the pump body, and an end cover is connected to the other end of the plunger channel.
6. 6. A plunger pulp pump as in claim 5, wherein the back dead center of the plunger reciprocating is located within the plunger channel.
7. 7. A plunger pulp pump as in claim 6, wherein said stuffing box is provided with a backwash port.
8. 8. The plunger pulp pump of claim 7, wherein the medium oscillating cavity is an inner cone at the bottom end of the pump body, the bottom end of the flow guide pipe is a cone head, the cone head partially stretches into the inner cone, and a plurality of medium inlets are circumferentially formed in the side wall of the flow guide pipe above the cone head.
9. 9. The plunger pulp pump of claim 8, wherein the top end of the pump body is connected with an outlet valve assembly, the outlet valve assembly is communicated with the top end of the flow guide pipe, the bottom end of the pump body is connected with an inlet valve assembly, and the inlet valve assembly is communicated with the inner cone.

Description

Slurry separation structure and plunger pulp pump Technical Field The invention relates to the field of plunger pumps, in particular to a slurry separation structure and a plunger pulp pump. Background The plunger pulp pump is equipment for realizing pulp conveying by changing the volume of a sealed working cavity through reciprocating motion of a plunger in a cylinder body. As shown in fig. 1, the existing plunger pulp pump mainly comprises a vertical pump body 1, a medium oscillation cavity 2 is arranged in the pump body 1, the top end of the pump body 1 is communicated with a one-way outlet valve, the bottom end of the pump body 1 is communicated with a one-way inlet valve, a vertical flow guide pipe 3 is arranged in the medium oscillation cavity 2 in a penetrating mode, the one-way outlet valve is communicated with the top end of the flow guide pipe 3, the upper end of the medium oscillation cavity 2 is transversely communicated with a stuffing box 4, a plunger 5 is arranged in the stuffing box 4, and as shown in fig. 2, the axis of the plunger 5 is perpendicularly intersected with the axis of the flow guide pipe 3. In the use process of the structure, when the plunger 5 is at a rear dead point, media can enter the stuffing box 4, and the stuffing box 4 is horizontally arranged, so that part of slurry media is deposited and accumulated at the stuffing box, and then gradually enters the plunger 5 and a sealing part, so that the plunger 5 and the sealing part are invalid. In order to avoid the situation, a pump body structure with a larger length is adopted in the prior art, and is matched with the long guide pipe 3, the primary volume of the medium oscillating cavity 2 is far larger than the primary volume of the plunger motion, so that the lower medium in the medium oscillating cavity 2 is mainly slurry medium under the action of gravity in the pumping process, and the upper medium is clear medium. In addition, a back flushing interface 6 is arranged at the front end of the plunger 5, injection medium is provided in a mode of reversing the movement of the plunger 5, slurry medium particles adhered to the surface of the plunger 5 are flushed, and the injection medium and the slurry medium are layered. After the practical application of the measures, slurry medium can be better lightened initially to enter the sealing position of the plunger 5, but due to the fact that the medium oscillation cavity 2 outside the guide pipe 3 lacks measures for isolating fluid turbulence, under the action of the fluid turbulence after long-term operation, slurry medium at the lower part is gradually mixed with injection medium entering the back flushing interface 6 to different degrees, three areas with fuzzy boundaries, namely an injection medium area 201, an injection medium and slurry medium mixing area 202 and a slurry medium area 203, are formed at the front end of the plunger 5 and in the medium oscillation cavity 2, and the injection medium and the slurry medium are fully mixed after a long time, and the slurry medium enters the sealing position of the plunger 5 in a large amount. And when the plunger 5 is in return stroke, a large part of areas where the existing slurry medium enters can not be automatically discharged after the slurry medium is deposited, so that the damage of the plunger 5 and the sealing is further aggravated, and the service life is seriously reduced. In addition, owing to adopted longer pump body 1 structure, still caused the increase of cost, plunger 5 and the perpendicular crossing of axis of honeycomb duct 3 for plunger 5 only can dismantle the maintenance from the rear end, and there is comparatively complicated power transmission and seal structure rear end, makes to overhaul very inconvenient. Disclosure of Invention The invention aims to provide a slurry separation structure so as to solve the problem that slurry medium enters a plunger and a sealing part when the conventional plunger pulp pump operates, so that the plunger and the sealing are invalid. The slurry separation structure comprises a pump body which is vertically arranged, a vertical medium oscillation cavity is arranged in the pump body, a guide pipe is vertically arranged in the medium oscillation cavity, the top end of the guide pipe is fixed on the pump body, a plunger channel which is communicated with the medium oscillation cavity is arranged at the side end of the upper part of the pump body, an upper limit ring is arranged at the upper section of the guide pipe, a lower limit ring is arranged above a medium inlet at the bottom of the guide pipe, a separation ring is sleeved in the middle of the guide pipe, an upper elastic supporting piece is sleeved on the guide pipe between the separation ring and the upper limit ring, the separation ring is limited below the plunger channel, and a lower elastic supporting piece is sleeved on the guide pipe between the separation ring and the lower limit ring. Preferably, as a modi