High-pressure plunger pump packing

Abstract

The utility model relates to the technical field of high-pressure plunger pump accessories, in particular to a high-pressure plunger pump packing which comprises a shell, a sliding cavity is formed in the shell, a plunger rod is connected in the sliding cavity in a sliding mode, an assembling groove is formed in the cavity wall of the sliding cavity, and a packing assembly is arranged in the assembling groove. The packing assembly comprises a lower guide ring abutting against the bottom wall of the assembling groove, a lower sealing ring is arranged above the lower guide ring, a conical metal sleeve is fixedly installed on the top face of the lower sealing ring, a built-in sealing ring is arranged in the conical metal sleeve in a sleeved mode, and the top end of the built-in sealing ring penetrates out of the conical metal sleeve and is fixedly provided with a center sealing sleeve. An external sealing ring is fixedly installed at the top end of the center sealing sleeve, an upper sealing ring is arranged above the external sealing ring, and the plunger rod penetrates through the lower guide ring, the internal sealing ring, the center sealing sleeve and the upper sealing ring. The utility model has better sealing effect, is not easy to leak, and is favorable for prolonging the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure plunger pump accessories, in particular to a packing of a high-pressure plunger pump. Background Art

[0002] High-pressure plunger pump is an industrial pump, mainly composed of plunger, plunger rod, pump housing, inlet and outlet valves and sealing rings. It uses plunger as compression element to convert the reciprocating motion of piston into pressure energy, and pushes liquid into the pipeline through the opening and closing control of valve; packing is generally arranged between the plunger rod and the corresponding housing of high-pressure plunger pump, and packing is also called sealing packing, which is assembled between housing and plunger rod to play the role of sealing and anti-leakage protection.

[0003] The number of packings installed between the housing and the plunger rod on the market is generally one, and the packing mainly relies on the interference fit between the inner wall of the housing and the plunger rod to achieve a good sealing effect. However, as the plunger rod moves frequently, the packing will wear due to friction. In addition, as the plunger rod moves, the position of the packing will also move. The corresponding limit clamping assembly of the defect cannot perform multi-layer sealing operations. It is easy to leak as the use time increases, affecting the use effect and causing inconvenience to the user. In view of this, we propose a high-pressure plunger pump packing. Utility Model Content

[0004] The utility model aims to provide a high-pressure plunger pump packing to solve the defects mentioned in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-pressure plunger pump packing comprises a shell, a sliding chamber is arranged in the shell, a plunger rod is slidably connected in the sliding chamber, an assembly groove is arranged on the cavity wall of the sliding chamber, a packing assembly is arranged in the assembly groove, the packing assembly comprises a lower guide ring resting on the bottom wall of the assembly groove, a lower sealing ring is arranged above the lower guide ring, a conical metal sleeve is fixedly installed on the top surface of the lower sealing ring, an inner sleeve of the conical metal sleeve is provided with a built-in sealing ring, the top end of the built-in sealing ring passes through the conical metal sleeve and is fixedly installed with a center sealing sleeve, an external sealing ring is fixedly installed on the top end of the center sealing sleeve, an upper sealing ring is arranged above the external sealing ring, and the plunger rod passes through the lower guide ring, the built-in sealing ring, the center sealing sleeve and the upper sealing ring.

[0007] Preferably, an inner support metal sleeve is fixedly mounted on the bottom surface of the upper sealing ring, and the inner support metal sleeve abuts against the inner surface of the external sealing ring to achieve an outward pressing operation on the external sealing ring to avoid direct wear between the plunger rod and the external sealing ring.

[0008] Preferably, an upper guide ring is provided above the upper sealing ring, and the plunger rod passes through the inner support metal sleeve and the upper guide ring, which is beneficial to the normal sliding operation of the plunger rod.

[0009] Preferably, the size of the plunger rod is matched with the sizes of the lower guide ring and the upper guide ring, so as to ensure stable sliding operation of the plunger rod.

[0010] Preferably, the conical metal sleeve is used to press the built-in sealing ring against the surface of the plunger rod, and the inner support metal sleeve is used to press the external sealing ring against the inner wall of the assembly groove, thereby achieving the effect of sealing both inside and outside at the same time, which helps to reduce leakage.

[0011] Preferably, a first flange is fixedly mounted on the top of the shell, a blocking disk is sleeved on the plunger rod, a second flange is fixedly mounted on the blocking disk, and a flange connection between the second flange and the first flange is used for assembly operation.

[0012] Preferably, a lower pressure ring is fixedly mounted on the bottom surface of the sealing disk, and the lower pressure ring is pressed against the upper surface of the upper guide ring to achieve a sufficient pressing and fixing operation on the packing assembly.

[0013] Preferably, the size of the lower pressure ring is matched with the size of the assembly groove for stabilizing the plug-in assembly operation.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model ensures that, when in use, multiple sealing operations can be performed using the upper sealing ring, the center sealing sleeve, the inner sealing ring, the outer sealing ring and the upper sealing ring. In addition, the inner sealing ring seals the plunger rod inwardly, and the outer sealing ring seals the assembly groove outwardly. The conical metal sleeve and the inner support metal sleeve have wear-resistant characteristics, thereby improving the sealing effect and achieving a full sealing effect.

[0016] 2. The utility model realizes the guiding operation of the plunger rod by means of the lower guide ring and the upper guide ring, and realizes the pressing operation of the packing assembly by means of the lower pressure ring, so that the packing assembly will not be shifted in position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the exploded structure of the packing assembly of the utility model;

[0020] Figure 4 It is a partial structural schematic diagram of the utility model.

[0021] The meaning of each number in the figure is:

[0022] 1. Housing; 10. Sliding chamber; 11. Assembly groove; 12. First flange; 13. Plunger rod;

[0023] 2. Packing assembly; 20. Lower guide ring; 21. Lower sealing ring; 22. Conical metal sleeve; 23. Center sealing sleeve; 24. Internal sealing ring; 25. External sealing ring; 26. Upper sealing ring; 27. Internal support metal sleeve; 28. Upper guide ring;

[0024] 3. Second flange; 30. Sealing plate; 31. Lower pressure ring. 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-Figure 4The utility model provides a technical solution: a high-pressure plunger pump packing, comprising a housing 1, a sliding chamber 10 is arranged in the housing 1, a plunger rod 13 is slidably connected in the sliding chamber 10, an assembly groove 11 is arranged on the cavity wall of the sliding chamber 10, a packing assembly 2 is arranged in the assembly groove 11, the packing assembly 2 comprises a lower guide ring 20 abutting against the bottom wall of the assembly groove 11, a lower sealing ring 21 is arranged above the lower guide ring 20, a conical metal sleeve 22 is fixedly installed on the top surface of the lower sealing ring 21, and the inner sleeve of the conical metal sleeve 22 is provided with An internal sealing ring 24 is provided, the top end of which passes through the conical metal sleeve 22 and is fixedly mounted with a central sealing sleeve 23, an external sealing ring 25 is fixedly mounted on the top end of the central sealing sleeve 23, an upper sealing ring 26 is arranged above the external sealing ring 25, and the plunger rod 13 passes through the lower guide ring 20, the internal sealing ring 24, the central sealing sleeve 23 and the upper sealing ring 26, so as to facilitate multiple sealing operations using the lower sealing ring 21, the central sealing sleeve 23, the internal sealing ring 24 and the upper sealing ring 26, thereby achieving a better sealing effect and preventing leakage.

[0027] In this embodiment, an inner support metal sleeve 27 is fixedly installed on the bottom surface of the upper sealing ring 26, and the inner support metal sleeve 27 is against the inner surface of the external sealing ring 25 to realize an outward pressing operation on the external sealing ring 25, thereby avoiding direct contact and wear between the plunger rod 13 and the external sealing ring 25.

[0028] Specifically, an upper guide ring 28 is provided above the upper sealing ring 26 , and the plunger rod 13 passes through the inner support metal sleeve 27 and the upper guide ring 28 , which is beneficial to the normal sliding operation of the plunger rod 13 .

[0029] Furthermore, the size of the plunger rod 13 is compatible with the sizes of the lower guide ring 20 and the upper guide ring 28 for stable sliding operation of the plunger rod 13 . Meanwhile, the lower guide ring 20 and the upper guide ring 28 can guide the movement of the plunger rod 13 .

[0030] In addition, the conical metal sleeve 22 is used to press the internal sealing ring 24 against the surface of the plunger rod 13, and the inner support metal sleeve 27 is used to press the external sealing ring 25 against the inner wall of the assembly groove 11, thereby achieving the effect of sealing both inside and outside at the same time, which is beneficial to reduce leakage.

[0031] It is worth noting that a first flange 12 is fixedly mounted on the top of the housing 1, a blocking disk 30 is sleeved on the plunger rod 13, a second flange 3 is fixedly mounted on the blocking disk 30, and a flange connection between the second flange 3 and the first flange 12 is used for assembly operation.

[0032] It is worth noting that a lower pressure ring 31 is fixedly installed on the bottom surface of the sealing disk 30 , and the lower pressure ring 31 is pressed against the upper surface of the upper guide ring 28 to achieve a sufficient pressing and fixing operation on the packing assembly 2 .

[0033] In this embodiment, the size of the lower pressing ring 31 is matched with the size of the assembly groove 11 for stabilizing the plug-in assembly operation.

[0034] When the high-pressure plunger pump packing of the utility model is in use, the built-in sealing ring 24 is inserted into the conical metal sleeve 22, the inner support metal sleeve 27 is inserted into the external sealing ring 25, and then the entire packing assembly 2 is sleeved on the plunger rod 13, and the packing assembly 2 is slid into the assembly groove 11 as a whole. Finally, the first flange 12 and the second flange 3 are fixed with fastening bolts to ensure that the lower pressure ring 31 is pressed tightly on the upper surface of the upper guide ring 28, and the fixing operation is completed, which is convenient for use.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-pressure plunger pump packing, comprising a housing (1), characterized in that: The housing (1) is provided with a sliding chamber (10), a plunger rod (13) is slidably connected in the sliding chamber (10), a mounting groove (11) is provided on the cavity wall of the sliding chamber (10), a packing assembly (2) is provided in the mounting groove (11), the packing assembly (2) comprises a lower guide ring (20) abutting against the bottom wall of the mounting groove (11), a lower sealing ring (21) is provided above the lower guide ring (20), a conical metal sleeve (22) is fixedly mounted on the top surface of the lower sealing ring (21), The conical metal sleeve (22) is internally sleeved with an internal sealing ring (24), the top end of the internal sealing ring (24) passes through the conical metal sleeve (22) and is fixedly mounted with a central sealing sleeve (23), the top end of the central sealing sleeve (23) is fixedly mounted with an external sealing ring (25), an upper sealing ring (26) is arranged above the external sealing ring (25), and the plunger rod (13) passes through the lower guide ring (20), the internal sealing ring (24), the central sealing sleeve (23) and the upper sealing ring (26).

2. The high-pressure plunger pump packing according to claim 1, characterized in that: An inner support metal sleeve (27) is fixedly mounted on the bottom surface of the upper sealing ring (26), and the inner support metal sleeve (27) abuts against the inner surface of the outer sealing ring (25).

3. The high-pressure plunger pump packing according to claim 2, characterized in that: An upper guide ring (28) is arranged above the upper sealing ring (26), and the plunger rod (13) passes through the inner support metal sleeve (27) and the upper guide ring (28).

4. The high-pressure plunger pump packing according to claim 3, characterized in that: The size of the plunger rod (13) is matched with the size of the lower guide ring (20) and the upper guide ring (28), so as to ensure stable sliding operation of the plunger rod (13).

5. The high-pressure plunger pump packing according to claim 2, characterized in that: The conical metal sleeve (22) is used to press the internal sealing ring (24) onto the surface of the plunger rod (13), and the internal support metal sleeve (27) is used to press the external sealing ring (25) onto the inner wall of the assembly groove (11).

6. The high-pressure plunger pump packing according to claim 3, characterized in that: A first flange (12) is fixedly mounted on the top of the housing (1), a sealing disk (30) is sleeved on the plunger rod (13), a second flange (3) is fixedly mounted on the sealing disk (30), and the second flange (3) is flange-connected to the first flange (12) for assembly operation.

7. The high-pressure plunger pump packing according to claim 6, characterized in that: A lower pressure ring (31) is fixedly mounted on the bottom surface of the sealing disk (30), and the lower pressure ring (31) is pressed tightly against the upper surface of the upper guide ring (28).

8. The high-pressure plunger pump packing according to claim 7, characterized in that: The size of the lower pressure ring (31) is matched with the size of the assembly groove (11) for stabilizing the plug-in assembly operation.

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