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CN-224214835-U - U-shaped packing with spring energy storage function

CN224214835UCN 224214835 UCN224214835 UCN 224214835UCN-224214835-U

Abstract

The utility model relates to the technical field of sealing and discloses a U-shaped packing for spring energy storage, which comprises a packing body and a U-shaped spring, wherein the cross section of the packing body is U-shaped, elastic pieces with tooth-shaped sawtooth edges are arranged on two sides of the packing body, the two elastic pieces are symmetrical by taking the central line of the cross section of the packing body as a symmetrical axis, the cross section of the U-shaped spring is U-shaped, rectangular through holes positioned on the same central line are formed in the inner side and the outer side of the U-shaped spring, and the U-shaped spring and the packing body are overlapped and connected through steps to form a spring energy storage structure. The packing is characterized in that a 90-degree right-angle step is arranged in the packing body, and the U-shaped spring is provided with a connecting step matched with the right-angle step. According to the U-shaped packing with the spring energy storage function, the packing can form certain tension through the close superposition of the U-shaped spring and the packing body, so that initial sealing is achieved, and the sealing performance of the packing is improved. Meanwhile, the packing has the characteristics of pressure resistance, high temperature resistance, acid and alkali resistance, long service life and the like.

Inventors

  • ZHANG KAI
  • WANG DIANHU
  • HAO YULIANG
  • CHEN ZHONG

Assignees

  • 江苏朗盛石油装备有限公司

Dates

Publication Date
20260508
Application Date
20250626

Claims (6)

  1. 1. The U-shaped packing comprises a packing body (1) and a U-shaped spring (2), and is characterized in that the cross section of the packing body (1) is U-shaped, elastic pieces (3) with tooth-shaped sawtooth edges are arranged on two sides of the packing body, the two elastic pieces (3) are symmetrical by taking the central line of the cross section of the packing body (1) as a symmetrical axis, the cross section of the U-shaped spring (2) is U-shaped, rectangular through holes (6) positioned on the same central line are formed in the inner side and the outer side of the U-shaped spring, and the U-shaped spring (2) and the packing body (1) are connected in a superposition mode through steps (5) to form a spring energy storage structure.
  2. 2. The spring energy storage U-shaped packing according to claim 1, wherein the packing body (1) is internally provided with a 90-degree right-angle step (4), and the U-shaped spring (2) is provided with a connecting step (5) matched with the right-angle step (4).
  3. 3. The spring energy storage U-shaped packing according to claim 1, wherein the packing body (1) is made of high-strength polytetrafluoroethylene material, and the U-shaped spring (2) is made of chromium vanadium steel material.
  4. 4. The spring energy-storage U-shaped packing according to claim 1, wherein the elastic pieces (3) of the tooth-shaped sawtooth edges are arranged on the inner side and the outer side of the packing body (1).
  5. 5. The spring energy storage U-shaped packing according to claim 1, wherein the rectangular through holes (6) of the U-shaped spring (2) are uniformly distributed along the axial direction.
  6. 6. The U-shaped packing with spring energy storage according to claim 1, wherein the structure formed by connecting the packing body (1) with the U-shaped spring (2) is suitable for a sealing cavity formed by a valve rod (8), a sealing gland (9), a packing retainer ring (10) and a valve cover (11).

Description

U-shaped packing with spring energy storage function Technical Field The utility model relates to the technical field of sealing, in particular to a spring energy storage U-shaped packing. Background Packing is also known as packing and is typically woven from relatively flexible threads, and strips of generally square or rectangular, circular or U-shaped cross-sectional area are filled into the seal cavity to effect the seal. The packing seal is used as the shaft seal of the water lifting machine at the earliest time by blocking fibers such as cotton and hemp in the leakage channel to prevent liquid flow leakage. The filler has wide sources, easy processing, low price, reliable sealing and simple operation, so the method is used up to date. The packing is widely used for rotary shaft sealing of centrifugal pumps, compressors, vacuum pumps, mixers and ship propellers, reciprocating shaft sealing of piston pumps, reciprocating compressors and refrigerators, rotating sealing of valve rods of various valves and the like. When the existing packing is used in axial sealing equipment, the packing is subjected to ultrahigh pressure continuous impact, the inner diameter of the packing is inevitably increased slightly under the long-term abrasion action, the sealing performance is continuously reduced, a certain gap exists between a circular ring formed inside the packing and a polish rod, and the phenomenon of leakage is easily caused due to the fact that the sealing is not tight. Therefore, we propose a spring-stored U-shaped packing to solve the problem. Disclosure of utility model The utility model aims to provide a spring energy storage U-shaped packing, which solves the problems in the background technology. The U-shaped packing comprises a packing body and a U-shaped spring, wherein the cross section of the packing body is U-shaped, elastic pieces with tooth-shaped sawtooth edges are arranged on two sides of the packing body, the two elastic pieces are symmetrical by taking the central line of the cross section of the packing body as a symmetrical axis, the cross section of the U-shaped spring is U-shaped, rectangular through holes positioned on the same central line are formed in the inner side and the outer side of the U-shaped spring, and the U-shaped spring and the packing body are overlapped and connected through steps to form a spring energy storage structure. Preferably, the packing body is internally provided with a 90-degree right-angle step, and the U-shaped spring is provided with a connecting step matched with the right-angle step. Preferably, the packing body is made of high-strength polytetrafluoroethylene material, has good ductility and quite high fatigue resistance and wear resistance, and the U-shaped spring is made of chromium vanadium steel material, and has good corrosion resistance, high temperature resistance and oxidation resistance. Preferably, the elastic pieces of the tooth-shaped sawtooth edges are arranged on the inner side and the outer side of the packing body. Preferably, the rectangular through holes of the U-shaped spring are uniformly distributed along the axial direction. Preferably, the structure formed after the packing body is connected with the U-shaped spring is suitable for a sealing cavity formed by the valve rod, the sealing gland, the packing retainer ring and the valve cover. The utility model provides a U-shaped packing with spring energy storage. The U-shaped packing with the spring energy storage function has the following beneficial effects: According to the U-shaped packing with the spring energy storage function, the packing can form certain tension through the close superposition of the U-shaped spring and the packing body, so that initial sealing is achieved, and the sealing performance of the packing is improved. Meanwhile, the packing has the characteristics of pressure resistance, high temperature resistance, acid and alkali resistance, long service life and the like. Drawings FIG. 1 is a schematic cross-sectional view of an embodiment of a spring-loaded U-shaped packing of the present utility model; FIG. 2 is a schematic axial view of a U-shaped spring in a spring-loaded U-shaped packing according to the present utility model; Fig. 3 is a schematic diagram of an axial sealing structure of a spring-stored U-shaped packing assembly of the spring-stored U-shaped packing assembly. In the figure, 1, a packing body; 2, U-shaped springs, 3, elastic pieces, 4, right-angle steps, 5, steps, 6, rectangular through holes, 8, valve rods, 9, sealing gland covers, 10, packing retainer rings, 11 and valve covers. Detailed Description For a clearer understanding of technical features, objects, and effects of the present utility model, a specific embodiment of the present utility model will be described with reference to the accompanying drawings. As shown in figures 1-3, the utility model provides a technical scheme that the U-shaped packing for spring energy storage c