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CN-122014665-A - Packing sealing structure for preventing packing from overflowing

CN122014665ACN 122014665 ACN122014665 ACN 122014665ACN-122014665-A

Abstract

The invention discloses a packing sealing structure for preventing packing from overflowing, which comprises a pump body, wherein a shaft and an impeller are arranged in the pump body, and the packing sealing structure also comprises a shaft sleeve sleeved on the outer side of the shaft, a packing box sleeved on the outer side of the shaft sleeve and matched with the pump body, and a ball valve arranged on the packing box, wherein a packing cavity is formed between the packing box and the shaft sleeve, packing, double-sealing packing and packing pads are filled in the packing cavity, and a packing gland for forming a packing effect is covered at an opening of the packing box; the invention has the advantages that the traditional shaft seal water position is replaced by the ball valve, meanwhile, the filling sequence and saturation control of the filler are optimized, the double-seal filler is kept in a tight and void-free filling state in the filler cavity, and the problem that the filler is easy to overflow in the traditional structure is fundamentally solved by matching with the plugging effect of the ball valve, and the equipment pollution and the environmental cleaning workload caused by the overflow of the filler are avoided.

Inventors

  • WANG NAN
  • GAO JINFU
  • WANG HAIFEI
  • SHI HUIHUI
  • WANG YALEI

Assignees

  • 石家庄金鲸源机械制造有限公司

Dates

Publication Date
20260512
Application Date
20260227

Claims (7)

  1. 1. The utility model provides a prevent packing seal structure that filler overflows, includes pump body (9), the inside of pump body (9) is provided with axle (5) and impeller (10), and its characterized in that is still including cover axle sleeve (51) that locate the axle (5) outside, cover locate axle sleeve (51) outside and with pump body (9) matched with packing box (1), set up ball valve (2) on packing box (1), be formed with the packing chamber between packing box (1) and axle sleeve (51), pack packing (4), double seal packing (6), packing pad (8) in this packing chamber, the opening part lid of packing box (1) has packed packing gland (3) to packing (4) formation compaction effect.
  2. 2. The packing seal structure for preventing the packing from overflowing according to claim 1, wherein the double-seal packing (6) is processed into a strip packing shape and is filled in the packing cavity, and the connecting positions of all sections of the double-seal packing (6) are arranged without gaps, so that the double-seal packing (6) maintains the preset saturation in the packing cavity.
  3. 3. A packing seal structure for preventing the overflow of packing according to claim 2, characterized in that the preset saturation of the double packing (6) is a packing state without gaps and not excessively compressed, and the double packing (6) is in flexible contact fit with the shaft sleeve (51).
  4. 4. A packing seal structure for preventing the overflow of packing according to claim 1, wherein the packing pad (8) is filled at the bottom of the packing cavity, and the packing pad (8) is kept flat after being compacted, and does not rotate relative to the shaft sleeve (51) and the packing box (1).
  5. 5. The packing sealing structure for preventing the packing from overflowing according to claim 1, wherein two packing elements (4) are arranged, one packing element (4) is arranged between the packing pad (8) and the double-sealing packing (6), and the other packing element (4) is arranged between the double-sealing packing (6) and the packing gland (3).
  6. 6. A packing seal structure for preventing overflow of packing according to claim 1, characterized in that the depth of the packing gland (3) pressed into the packing box (1) is not less than 5mm, so that the packing (4) pressed by the packing gland (3) is tightly attached to the double-seal packing (6).
  7. 7. The packing sealing structure for preventing the packing from overflowing according to claim 1, wherein the ball valve (2) is in sealing connection with the packing box (1), the plugging end of the ball valve (2) is communicated with the packing cavity, and double-sealing packing (6) is prevented from overflowing from the connection position of the ball valve (2) and the packing box (1).

Description

Packing sealing structure for preventing packing from overflowing Technical Field The invention belongs to the technical field of sealing and machinery, and particularly relates to a filler sealing structure for preventing filler from overflowing. Background In the field of mechanical manufacture and fluid delivery, the sealing performance of a shaft body of the fluid delivery device taking a pump product as a core directly determines the running stability, the service life and the production operation safety of the device, and the packing sealing structure has the advantages of simple structure, low manufacturing cost, convenience in installation and the like, and becomes one of the most widely applied sealing forms in the shaft body sealing of the pump product. In the practical industrial application process, a plurality of technical defects which are difficult to solve are exposed out of the traditional packing sealing structure, the packing and the shaft sleeve of the traditional packing sealing structure are in rigid friction contact, even if the packing is cooled and washed by shaft seal water, serious abrasion is generated on the shaft sleeve, the abrasion of the shaft sleeve can lead to continuous increase of a sealing gap, the frequent replacement of the shaft sleeve and the packing is required, the consumption cost of vulnerable parts is increased, the maintenance and replacement are required, the continuous production operation is greatly influenced, the production efficiency is greatly reduced, the continuous supply of the shaft seal water not only causes a great deal of waste of water resources, but also is easy to mix with a conveying medium, the medium purity is reduced, the production process with the medium purity requirement is also required to be increased, the overall cost of the production process is improved, the packing filling mode of the traditional packing sealing structure is simpler, the packing is extremely easy to overflow from the gap of the packing box due to pressure impact and rotation of a shaft body, the overflowed packing can pollute equipment and an operation environment, the on site cleaning and maintenance workload is increased, the traditional packing structure is poor in sealing effect, the sealing structure is difficult to realize, the periodic leak of the conventional packing is difficult to realize, the sealing structure is easy to cause the safety and the safety is easy to be leaked, the safety and the safety is also required to be easily leaked by the personnel, and the safety is not easy to cause the safety to be required to be periodically and the environmental-polluted, and frequent manual operation also increases the potential safety hazard of equipment operation. At present, aiming at the defects of the traditional packing sealing structure, some simple improvements are also carried out in the industry, such as changing packing materials with better wear resistance, optimizing the fastening mode of a packing gland and the like, but the improvements can only relieve the wear problem to a certain extent, can not fundamentally solve the core problems of overflow of packing, serious abrasion of a shaft sleeve, need of shaft seal water cooling, incapability of sealing without stopping and the like, and still are difficult to meet the requirements of high sealing performance, long service life, low maintenance cost and online restoration of the pump body sealing structure in industrial production. Disclosure of Invention The invention aims to provide a packing sealing structure for preventing packing from overflowing, which effectively solves the problems of easy overflow of packing and serious abrasion of a shaft sleeve in the traditional structure, realizes the non-stop sealing of pump products, simultaneously cancels a shaft seal water structure, avoids unnecessary medium and water resource waste, reduces the maintenance cost of equipment and the consumption cost of vulnerable parts, and improves the working efficiency of a pump body shaft body and the running stability of the equipment. The packing sealing structure comprises a pump body, wherein a shaft and an impeller are arranged in the pump body, a shaft sleeve sleeved on the outer side of the shaft, a packing box sleeved on the outer side of the shaft sleeve and matched with the pump body, and a ball valve arranged on the packing box, a packing cavity is formed between the packing box and the shaft sleeve, packing, double-sealing packing and packing pads are filled in the packing cavity, and a packing gland for forming a compression effect on the packing is covered at an opening of the packing box. Preferably, the double-seal packing is processed into a strip packing shape and is filled in the packing cavity, and the connecting positions of all sections of the double-seal packing are arranged without gaps, so that the double-seal packing keeps preset saturation in the packing cavity. Preferably, the pre