CN114576156A - Sealing device of plunger pump - Google Patents
Sealing device of plunger pump Download PDFInfo
- Publication number
- CN114576156A CN114576156A CN202011377881.0A CN202011377881A CN114576156A CN 114576156 A CN114576156 A CN 114576156A CN 202011377881 A CN202011377881 A CN 202011377881A CN 114576156 A CN114576156 A CN 114576156A
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- Prior art keywords
- packing box
- head body
- pump head
- packing
- sealing
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- 238000007789 sealing Methods 0.000 title claims abstract description 134
- 238000012856 packing Methods 0.000 claims abstract description 236
- 210000004907 gland Anatomy 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 239000012530 fluid Substances 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 239000004576 sand Substances 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 11
- 239000010687 lubricating oil Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/02—Packing the free space between cylinders and pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The application discloses sealing device of plunger pump belongs to oil gas exploitation technical field. The sealing device of the plunger pump comprises: packing box, sealed packing, gland and fastener. The first end of the sealing gland is provided with a first annular bulge, the second end of the sealing gland is positioned in a groove in a pump head body in the plunger pump, the first end of the fastener can be fixedly connected with the first bulge, and the second end of the fastener can be fixedly connected with the pump head body. Therefore, on the premise that only the contact relation between the second end of the packing box and the groove in the pump head body is ensured and the threaded connection relation does not exist, the fastening connection between the packing box and the pump head body is realized through the fastening piece, so that the sealing device is firmly installed between the pump head body and the plunger body. The phenomenon that the packing box cannot be detached from the pump head body after sand in fracturing fluid enters the area between the pump head body and the packing box is effectively avoided in the follow-up process of fracturing oil gas by the plunger pump.
Description
Technical Field
The application relates to the technical field of oil and gas exploitation, in particular to a sealing device of a plunger pump.
Background
In the course of oil and gas production, in order to increase production, it is necessary to perform a fracturing treatment on the oil and gas well. At present, a fracturing truck group with a plunger pump is generally adopted to inject fracturing fluid into an oil and gas well so as to perform fracturing treatment on the oil and gas well.
The plunger pump generally comprises: the packing box comprises a pump head body, a plunger piston body and a packing box positioned between the plunger piston body and the pump head body. One end of the plunger body is typically located within the pump head body and the other end is typically located outside the pump head body. This packing box can cup joint on the plunger body, and this packing box is close to the one end of pump head body and has the external screw thread, this pump head body have with this external screw thread fit have the internal screw thread recess, the packing box can be connected through cooperation and the pump head body between this external screw thread and the internal thread. Therefore, the plunger piston body and the pump head body can be sealed through the packing box.
However, when the oil gas is subjected to fracturing treatment, sand carried in the fracturing fluid enters the area between which the pump head body and the packing box are connected through the pump head body, the threaded connection relation between the pump head body and the packing box can be damaged, the packing box is difficult to detach from the pump head body, and the replacement efficiency of a sealing packing in the packing box can be influenced.
Disclosure of Invention
The embodiment of the application provides a sealing device of a plunger pump. The problem of prior art's the lower efficiency of change to the sealed packing in the packing box can be solved, technical scheme is as follows:
there is provided a sealing device of a plunger pump, the plunger pump including: the pump comprises a plunger body and a pump head body, wherein one end of the plunger body is positioned in the pump head body, the other end of the plunger body is positioned outside the pump head body, one side of the pump head body, which is close to the plunger body, is provided with a groove, and the plunger body penetrates through the groove; the sealing device comprises:
the packing box is provided with a first through hole, the packing box is sleeved on the plunger body through the first through hole, an annular first bulge is arranged at the first end of the packing box, and the second end of the packing box is located in the groove;
a sealing packing located between the packing box and the plunger body;
the sealing gland is connected with one side, away from the pump head body, of the first through hole in the packing box;
and the first end of the fastener is fixedly connected with the first bulge in the packing box, and the second end of the fastener is fixedly connected with the pump head body.
Optionally, the first protrusion has a second through hole, the first end of the fastener has a sheet-shaped clamping piece, the second end of the fastener passes through the second through hole with the pump head body fastening connection, and after the second end of the fastener with the pump head body fastening connection, the clamping piece with the first protrusion is kept away from one side butt of the pump head body.
Optionally, the fastener is a fastening bolt, and the fastening bolt is in threaded connection with the pump head body.
Optionally, the number of the fastening bolts in the sealing device is multiple, and the multiple fastening bolts are uniformly distributed on the annular first protrusion.
Optionally, the shape of the second end of the packing box matches the shape of the groove, and an annular sealing groove is formed in a sidewall of the packing box located in the groove, and the sealing device further includes: the annular sealing element is positioned in the sealing groove, and one side, far away from the sealing groove, of the annular sealing element is abutted against the side wall of the groove.
Optionally, the material of the annular seal comprises: a rubber material or a silicone material.
Optionally, the sealing device further includes: the packing ring is located the sealed packing is close to one side of the pump head body, the packing clamping ring is located the sealing gland with between the sealed packing.
Optionally, the packing box further has a lubricating medium injection hole communicated with the first through hole, and one end of the lubricating medium injection hole communicated with the first through hole is located between the seal gland and the seal packing.
Optionally, the sealing gland is provided with a third through hole, the sealing gland is sleeved on the plunger body through the third through hole, an external thread is arranged on the side wall of the sealing gland, an internal thread matched with the external thread is arranged on one side, away from the pump body, of the first through hole in the packing box, and the sealing gland is connected with the packing box through the matching of the external thread and the internal thread.
Optionally, one side that gland kept away from the packing box has annular second arch, the second arch with the packing box is kept away from one side butt of pump head body.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
the sealing device of the plunger pump comprises: packing box, sealed packing, gland and fastener. The first end of the sealing gland is provided with a first annular bulge, the second end of the sealing gland is positioned in a groove in a pump head body in the plunger pump, the first end of the fastener can be tightly connected with the first bulge, and the second end of the fastener can be tightly connected with the pump head body. Therefore, only the contact relation between the second end of the packing box and the groove in the pump head body is ensured, and on the premise that the threaded connection relation does not exist, the fastening connection between the packing box and the pump head body is realized through the fastening piece, so that the sealing device is firmly installed between the pump head body and the plunger body. The effectual follow-up plunger pump of having avoided advances the in-process that carries out the fracturing treatment to oil gas, and the sand in the fracturing fluid gets into the regional back between pump head body and the packing box, appears the phenomenon that the packing box can't be dismantled from the pump head body, and then has improved the efficiency of changing the sealed packing in this packing box for the life of this plunger pump is higher. And, when adjusting the discharge capacity of this plunger pump, need not to follow the packing box among the sealing device of this plunger pump and trade, can guarantee this plunger pump and can realize under the prerequisite of the free adjustment of multiple discharge capacity, the effectual manufacturing cost who reduces this plunger pump.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a sealing device of a plunger pump according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of another sealing device of a plunger pump according to an embodiment of the present application;
fig. 3 is a side view of the sealing device of the plunger pump shown in fig. 2.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a sealing device of a plunger pump according to an embodiment of the present disclosure. The plunger pump may include: a sealing device 000, a plunger body 001 and a pump head body 002.
One end of the plunger body 001 may be located inside the pump head body 002, and the other end of the plunger body 001 may be located outside the pump head body 00. One side of the pump head body 002 near the plunger body 001 has a groove 002a, and the plunger body 001 can penetrate through the groove 002a in the pump head body 002. That is, one end of the pump head body 002 needs to pass through the groove 002a of the pump head body 002 and then be located in the pump head body 002.
The sealing device 000 may include: the packing box 100, the seal packing 200, the seal gland 300 and the fastener 400.
The packing box 100 has a first through hole 101. The packing box 100 can be sleeved on the plunger body 001 through the first through hole 101. The packing box 100 has a first annular protrusion 102 at a first end thereof, and the packing box 102 may be located in a recess 002a in the pump body 002 at a second end thereof.
The first end of the fastener 400 may be fastened to the first protrusion 102 of the packing box 100, and the second end of the fastener 400 may be fastened to the pump head body 002. In this manner, the fastening member 400 can securely fasten the sealing device 000 to the pump head body 002.
The packing set 200 may be located between the packing box 100 and the plug body 001. For example, the shape of the first through-hole 101 in the packing box 100 may match the shape of the plunger body 001, for example, if the plunger body 001 is cylindrical, the first through-hole 101 in the packing box 100 is a circular through-hole. Thus, after the packing box 100 is fitted to the plunger body 001, a ring-shaped annular space can be formed between the packing box 100 and the plunger body 001. This sealed packing 200 can twine back on the plunger body 001, will twine the sealed packing 200 setting on the plunger body 001 in the annular space of the ring form between packing box 100 and the plunger body 001, effectual improvement sealed packing 200 carries out sealed effect to the gap between the plunger body 001 and the pump head body 002. It should be noted that, the sealing packing 200 can seal the plunger body 001 in the axial direction thereof, so as to effectively avoid the problem that the liquid in the pump head body 002 leaks along the axial direction of the plunger body 001.
The gland 300 may be connected to a side of the first through hole 101 of the packing box 100 away from the pump body 002. Can extrude the sealed packing 200 that is located between packing box 100 and the plunger body 001 through this sealed gland 300, avoid this sealed packing 200 to leak out from between packing box 100 and the plunger body 001, guarantee that sealed packing 200 can carry out effectual sealing to it in the axial of the plunger body 001.
In the embodiment of the present application, the second end of the packing box 100 is located in the groove 002a of the pump body 002, no thread is provided on the second end of the packing box 100 and the groove 002a of the pump body 002, and the second end of the packing box 102 only has a contact relationship with the groove 002a of the pump body 002, and there is no threaded connection relationship. Furthermore, the first end of the packing box 100 is provided with a ring-shaped first protrusion 102, the ring-shaped first protrusion 102 is fastened to the first end of the fastening member 400, and the second end of the fastening member 400 can be fastened to the pump head body 002. Therefore, on the premise that only the contact relation between the second end of the packing box 100 and the groove 002a in the pump head body 002 exists and the threaded connection relation does not exist, the fastening connection between the packing box 100 and the pump head body 002 is realized through the fastening piece 400, so that the sealing device 000 is firmly installed between the pump head body 002 and the plunger body 001. The phenomenon that the packing box 100 cannot be detached from the pump head body 002 appears after sand in fracturing fluid enters the area between the pump head body 002 and the packing box 100 in the follow-up process of fracturing oil gas in the plunger pump is effectively avoided, and the efficiency of replacing the sealing packing 200 in the packing box 100 is further improved.
In summary, the sealing device of the plunger pump provided by the embodiment of the present application includes: packing box, sealed packing, gland and fastener. The first end of the sealing gland is provided with a first annular bulge, the second end of the sealing gland is positioned in a groove in a pump head body in the plunger pump, the first end of the fastener can be fixedly connected with the first bulge, and the second end of the fastener can be fixedly connected with the pump head body. Therefore, only the contact relation between the second end of the packing box and the groove in the pump head body is ensured, and on the premise that the threaded connection relation does not exist, the fastening connection between the packing box and the pump head body is realized through the fastening piece, so that the sealing device is firmly installed between the pump head body and the plunger body. The phenomenon that the packing box cannot be detached from the pump head body is effectively avoided after sand in fracturing fluid enters an area between the pump head body and the packing box in the process of fracturing oil gas by the plunger pump, and therefore the efficiency of replacing the sealing packing in the packing box is improved, and the plunger pump is long in service life.
In the embodiment of the present application, please refer to fig. 2, and fig. 2 is a schematic structural diagram of another sealing device of a plunger pump according to the embodiment of the present application. The annular first protrusion 102 on the first end of the packing box 100 in the sealing device 000 has a second through hole 102 a. The first end of the fastener 400 in the sealing device 000 has a sheet-like snap-in member 401. The second end of the fastener 400 in the sealing device 000 can pass through the second through hole 102a in the first protrusion 102 and then be tightly connected with the pump head body 002 in the plunger pump. In the present application, after the second end of the fastening member 400 is fastened to the pump head body 002 of the plunger pump, the snap-fit member 401 at the first end of the fastening member 400 abuts against the side of the annular first projection 102 at the first end of the packing box 100 away from the pump head body 002. In this way, the packing box 100 can be fixed to the pump head body 002 after the second end of the fastener 400 is fastened to the pump head body 002 by the engagement between the snap-fit member 401 on the first end of the fastener 400 and the first protrusion 102.
Illustratively, the second end of the fastener 400 in the sealing device 000 has an external thread, and the pump head body 002 further has a threaded hole 002b matched with the external thread of the second end of the fastener 400, so that the second end of the fastener 400 and the pump head body 002 can be tightly connected through the matching between the external thread and the threaded hole 002 b.
In this case, the fastener 400 in the sealing device 000 may be a fastening bolt 400. The fastening bolt 400 may be screwed with the pump head body 002.
Optionally, the sealing device 000 may further include: and the gasket 500 is positioned between the clamping piece 401 on the first end of the fastening bolt 400 and the annular first bulge 102 on the first end of the packing box 100. The gasket 500 may be first sleeved on the fastening bolt 400, and then the first protrusion 102 and the pump head body 002 are connected by the fastening bolt 400. The contact area between the first end of the fastening bolt 400 and the first protrusion 102 can be increased by the spacer 500, and the phenomenon that the clamping piece 401 on the first end of the fastening bolt 400 abrades the outer surface of the first protrusion 102 in the process of installing the fastening bolt 400 is avoided.
In the embodiment of the present application, as shown in fig. 3, fig. 3 is a side view of the sealing device of the plunger pump shown in fig. 2. The number of the fastening bolts 400 in the sealing device 000 may be plural. Thus, after the sealing device 000 is connected with the pump body 002 through the fastening bolts 400, the firmness between the sealing device 000 and the pump body 002 can be effectively increased, and the sealing device 000 can effectively seal the area between the pump body 002 and the plunger body 001.
For example, the plurality of fastening bolts 400 in the sealing device 000 may be evenly distributed on the annular first protrusion 102 on the first end of the packing box 100. In this way, after the plurality of fastening bolts 400 are coupled to the pump head body 002, the annular first projection 102 is uniformly fastened by the plurality of fastening bolts 400. For example, the sealing device 000 may include: 4 fastening bolts 400, the 4 fastening bolts 400 may be evenly distributed on the annular first protrusion 102.
In the embodiment of the present application, as shown in fig. 2, the shape of the second end of the packing box 100 in the sealing device 000 may match the shape of the groove 002a in the pump head body 002. Thus, the second end of the packing box 100 of the seal assembly 000 is loosely fitted into the recess 002a of the pump body 002. For example, the packing box 100 in the sealing device 000 has a cylindrical shape at the second end, and the groove 002a in the pump head body 002 may be a cylindrical groove matching the cylindrical shape.
It should be noted that, in order to ensure that the second end of the packing box 100 of the sealing device 000 is smoothly installed in the groove 002a of the pump body 002, the size of the end surface of the second end of the packing box 100 is slightly smaller than the bottom surface of the groove 002 a. For example, when the second end of the packing box 100 in the seal device 000 has a cylindrical shape and the groove 002a in the pump head body 002 may be a cylindrical groove matching the cylindrical shape, the diameter of the second end of the packing box 100 is slightly smaller than the inner diameter of the groove 002 a. For example, the diameter of the second end of the packing box 100 may be 0.1 mm smaller than the inner diameter of the groove 002 a.
Alternatively, as shown in fig. 2, the packing box 100 is provided with an annular seal groove 103 on the sidewall thereof in the recess 002a of the pump body 002. The sealing device 000 may further include: an annular seal 600 located within the seal groove 103. The side of the annular seal 600 away from the annular seal groove 103 in the packing box 100 may abut against the side wall of the groove 002a in the pump head body 002.
In the embodiment of the present application, the fit between the annular seal 600 located in the annular seal groove 103 of the packing box 100 and the groove 002a of the pump head body 002 is an interference fit. Therefore, the sealing element 600 between the packing box 101 and the pump body 002 in the sealing device 000 can seal the plunger body 001 in the radial direction, and the problem that liquid in the pump body 00 leaks in the radial direction of the plunger body 001 is effectively avoided.
Optionally, the material of the annular seal 600 in the sealing device 000 may include: rubber material or silicone material, etc.
In the embodiment of the present application, as shown in fig. 2, the sealing device 000 may further include: the packing washer 700 and the packing press ring 800 are positioned between the packing box 100 and the plunger body 001. The packing washer 700 is located on one side of the packing 200 close to the pump head body 002, and the packing press ring 800 may be located between the packing gland 300 and the packing 200. The packing washer 700 and the packing press ring 800 in the sealing device 000 can be sleeved on the plunger body 001 and are in clearance fit with the plunger body 001.
In this application, because the packing washer 700 in the sealing device 000 has a high flatness, when the packing washer 700 is located between the packing box 100 and the plunger body 001 in the sealing device 000 and contacts with the sealing packing 200 in the sealing device 000, the sealing packing 200 can be uniformly distributed between the packing box 100 and the plunger body 001, and the effect of sealing in the axial direction of the plunger body 001 is improved.
For example, the first end of the packing box 100 in the sealing device 000 further has an annular third protrusion 105, and the annular third protrusion 105 may be located on a sidewall of the first through hole 101 in the packing box 100. In this case, the packing ring 800 of the sealing device 000 on the side away from the seal packing 200 may abut against the annular third projection 105. The packing gasket 700 in the packing box 100 can be effectively prevented from falling off from the packing box 100 by the third protrusion 105, and the stability of the packing box 100 during assembly of the sealing packing 200 is ensured.
In this application, the packing press ring 800 sleeved on the plunger body 001 is located on one side of the sealing packing 200 far away from the pump head body 002. After the packing gland 300 in the packing arrangement 000 is assembled on the second end of the packing box 100, the packing gland 300 may apply pressure to the packing ring 800 such that the packing ring 800 may apply pressure to the packing set 200. Therefore, the sealing packing 200 between the packing box 100 and the plunger body 001 can be tightly pressed, and the effect of sealing the sealing packing 200 in the axial direction of the plunger body 001 is further improved.
Alternatively, as shown in fig. 2, the packing box 100 of the sealing device 000 further has a lubricating oil medium inlet 104 communicating with the first through hole 101. An end of the packing box 100, at which the lubricating oil medium injection hole 104 communicates with the first through hole 101, may be located between the packing gland 300 and the packing set 200 in the packing device 000. In this way, the end of the packing box 100, at which the lubricating oil medium injection hole 104 communicates with the first through hole 101, is aligned with the packing ring 800 located between the packing gland 300 and the packing set 200.
And the end face of the other end of the lubricating oil medium injection hole 104 is coplanar with the surface of the outer wall of the packing box 100, that is, the lubricating oil medium injection hole 104 penetrates through the side wall of the packing box 100, and the packing ring 800 and the packing box 100 have a gap on the inner wall. Therefore, when the lubricating oil medium is injected into the packing box 100 through the lubricating oil medium injection hole 104 of the packing box 100, the lubricating oil medium can flow to the seal packing 200. Can lubricate protection to sealed packing 200 through this lubricating oil medium, avoid carrying out the in-process that stretches out and draws back at the plunger body 001, because the frictional force between the plunger body 001 and the sealed packing 200 is great, lead to this sealed packing 200 by the phenomenon of the plunger body 001 wearing and tearing of the process of stretching out and drawing back, and then improved this sealed packing 200's life.
Alternatively, the lubricant medium may be grease injected into the sealing box 100 through the lubricant medium injection hole 104.
In the embodiment of the present application, the gland 300 of the sealing device 000 has a third through hole 301. The gland 300 may be sleeved on the plunger body 001 through a third through hole 301 formed therein. And, the side wall of the gland 300 has an external thread, and the side of the first through hole 101 in the packing box 100 of the sealing device 000 away from the pump head body 002 has an internal thread matching with the external thread. The gland 300 may be coupled to the first end of the packing box 100 by mating the external threads with the internal threads. So, be threaded connection between this gland 300 and the first end of packing box 100, through the first end screw in gland 300 to packing box 100, can let this gland 300 exert sufficient effort to packing clamping ring 800, guarantee that this packing clamping ring 800 can compress tightly the packing 200 that is located between packing box 100 and the plunger body 001.
In the example, the side of the gland 300 away from the packing box 100 in the sealing device 000 has a second annular protrusion 302. After the gland 300 is assembled to the first end of the packing box 100, the annular second protrusion 302 of the gland 300 may abut against a side of the packing box 100 away from the pump head body 002. Through the annular second protrusion 302 on this gland 300, can be convenient for assemble gland 300 on the first end of packing box 100, and can indicate to operating personnel that the packing 200 that is located between packing box 100 and the plunger body 001 compresses tightly the degree. In general, after the annular second protrusion 302 of the gland 300 abuts against the side of the packing box 100 away from the pump body 002, the gland 300 can be considered to have compressed the packing set 200 between the packing box 100 and the plunger body 001. Thus, the assembling difficulty of the seal gland 300 can be reduced under the condition that the compression degree of the seal packing 200 between the packing box 100 and the plunger body 001 is high.
Optionally, the materials of the seal packing 200 in the sealing device 000 in the above embodiment may include: a rubber material. The seal packing 200 may be an annular seal packing 200, which may be sleeved on the plunger body 001. In this application, the number of the seal packing sets 200 in the seal device 000 may be at least one, and it should be noted that the seal device 000 shown in fig. 2 is schematically illustrated by including three seal packing sets 200 arranged in series.
The following examples illustrate the advantages of the sealing device of the plunger pump provided by the embodiments of the present application in two aspects:
in a first aspect, the sealing device 000 of the plunger pump provided in the embodiment of the present application has an advantage of high replacement efficiency for the sealing packing set 200.
For example, since the second end of the packing box 100 in the sealing device 000 is located in the groove 002a in the pump body 002 and the second end of the packing box 100 is in clearance fit with the groove 002a in the pump body 002, that is, the second end of the packing box 100 and the groove 002a in the pump body 002 are both provided with threads, the second end of the packing box 102 is only in contact with the groove 002a in the pump body 002 and does not have a threaded connection. The first end of the packing box 100 is provided with an annular first protrusion 102, the annular first protrusion 102 can abut against a clamping member 401 on the first end of the fastening bolt 400, and the second end of the fastening bolt 400 can be in threaded connection with the pump head body 002. Thus, on the premise that only the contact relation between the second end of the packing box 102 and the groove 002a in the pump head body 002 is ensured and the threaded connection relation does not exist, the packing box 100 and the pump head body 002 are fastened and connected through the plurality of fastening screws 400, so that the sealing device 000 is firmly installed between the pump head body 002 and the plunger body 001. The phenomenon that the packing box 100 cannot be detached from the pump head body 002 occurs after sand in fracturing fluid enters the area between the pump head body 002 and the packing box 100 in the follow-up process of fracturing oil gas by the plunger pump is effectively avoided, and the efficiency of replacing the sealing packing 200 in the packing box 100 is further improved.
In a second aspect, the sealing device 000 of the plunger pump provided in the embodiments of the present application has an advantage of being able to adapt to plunger pumps of various displacements.
Illustratively, when it is desired to adjust the displacement of a plunger pump, it is desired to adjust the size of the plunger body 001 in the plunger pump. Through the sealing device 000 that this application embodiment provided, only need adjust sealed packing 200, packing ring 700 and packing clamping ring 800 among this sealing device 000, guarantee this sealed packing 200, packing ring 700 and packing clamping ring 800 size and wait to follow the size phase-match that the plunger body 001 traded can. There is no need to adjust the packing set 200, the gland 300, the fastening bolt 400, the washer 500, and the annular seal 600 in the sealing device 000. So, can guarantee under the prerequisite that the free adjustment of multiple discharge capacity can be realized to the plunger pump, effectual manufacturing cost who reduces this plunger pump, and simplified the process when adjusting the discharge capacity of plunger pump.
In summary, the sealing device of the plunger pump provided by the embodiment of the present application includes: packing box, sealed packing, gland and fastener. The first end of the sealing gland is provided with a first annular bulge, the second end of the sealing gland is positioned in a groove in a pump head body in the plunger pump, the first end of the fastener can be fixedly connected with the first bulge, and the second end of the fastener can be fixedly connected with the pump head body. Therefore, only the contact relation between the second end of the packing box and the groove in the pump head body is ensured, and on the premise that the threaded connection relation does not exist, the fastening connection between the packing box and the pump head body is realized through the fastening piece, so that the sealing device is firmly installed between the pump head body and the plunger body. The effectual follow-up plunger pump of having avoided advances the in-process that carries out the fracturing treatment to oil gas, and the sand in the fracturing fluid gets into the regional back between pump head body and the packing box, appears the phenomenon that the packing box can't be dismantled from the pump head body, and then has improved the efficiency of changing the sealed packing in this packing box for the life of this plunger pump is higher. And, when adjusting the discharge capacity of this plunger pump, need not to follow the packing box among the sealing device of this plunger pump and trade, can guarantee this plunger pump and can realize under the prerequisite of the free adjustment of multiple discharge capacity, the effectual manufacturing cost who reduces this plunger pump.
In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.
Claims (10)
1. A sealing arrangement for a plunger pump, the plunger pump comprising: the pump comprises a plunger body and a pump head body, wherein one end of the plunger body is positioned in the pump head body, the other end of the plunger body is positioned outside the pump head body, one side of the pump head body, which is close to the plunger body, is provided with a groove, and the plunger body penetrates through the groove; the sealing device includes:
the packing box is provided with a first through hole and is sleeved on the plunger body through the first through hole, the first end of the packing box is provided with an annular first bulge, and the second end of the packing box is positioned in the groove;
a sealing packing located between the packing box and the plunger body;
the sealing gland is connected with one side, away from the pump head body, of the first through hole in the packing box;
and the first end of the fastener is fixedly connected with the first bulge in the packing box, and the second end of the fastener is fixedly connected with the pump head body.
2. The sealing device of claim 1,
first arch has the second through-hole, the first end of fastener has flaky joint spare, the second end of fastener passes the second through-hole with pump head body fastening connection, and the second end of fastener with behind the pump head body fastening connection, joint spare with first arch is kept away from one side butt of pump head body.
3. The sealing device of claim 2,
the fastener is a fastening bolt, and the fastening bolt is in threaded connection with the pump head body.
4. The sealing device of claim 3,
the sealing device is characterized in that the number of the fastening bolts in the sealing device is multiple, and the fastening bolts are uniformly distributed on the annular first bulge.
5. The sealing device of claim 1,
the shape of the second end of packing box with the shape of recess matches, is located annular seal groove has on the lateral wall of the packing box in the recess, sealing device still includes: the annular sealing element is positioned in the sealing groove, and one side, far away from the sealing groove, of the annular sealing element is abutted against the side wall of the groove.
6. The sealing device of claim 5,
the material of the annular seal comprises: a rubber material or a silicone material.
7. The sealing device according to any one of claims 1 to 6,
the sealing device further comprises: the packing ring is located the sealed packing is close to one side of the pump head body, the packing clamping ring is located the sealing gland with between the sealed packing.
8. The sealing device of claim 7,
the packing box is also provided with a lubricating medium injection hole communicated with the first through hole, and one end of the lubricating medium injection hole communicated with the first through hole is positioned between the sealing gland and the sealing packing.
9. The sealing device according to any one of claims 1 to 6,
the packing box is characterized in that the sealing gland is provided with a third through hole, the sealing gland is sleeved on the plunger body through the third through hole, an external thread is arranged on the side wall of the sealing gland, an internal thread matched with the external thread is arranged on one side, away from the pump head body, of the first through hole in the packing box, and the sealing gland is connected with the packing box through the matching of the external thread and the internal thread.
10. The sealing device of claim 9,
one side of the sealing gland, which is far away from the packing box, is provided with an annular second bulge, and the second bulge is abutted against one side of the packing box, which is far away from the pump head body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377881.0A CN114576156A (en) | 2020-11-30 | 2020-11-30 | Sealing device of plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377881.0A CN114576156A (en) | 2020-11-30 | 2020-11-30 | Sealing device of plunger pump |
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| Publication Number | Publication Date |
|---|---|
| CN114576156A true CN114576156A (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011377881.0A Pending CN114576156A (en) | 2020-11-30 | 2020-11-30 | Sealing device of plunger pump |
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| Country | Link |
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| CN (1) | CN114576156A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202991461U (en) * | 2012-12-25 | 2013-06-12 | 上海清河机械有限公司 | Fluid end assembly of plunger pump |
| CN104564646A (en) * | 2014-12-18 | 2015-04-29 | 南京松本水处理技术有限公司 | Sealing device for plunger pump and plunger pump |
| CN207470777U (en) * | 2017-10-18 | 2018-06-08 | 江苏飞跃机泵集团有限公司 | A kind of stuffing seal for being used to seal the strong volatility toxic liquid of deep-etching |
-
2020
- 2020-11-30 CN CN202011377881.0A patent/CN114576156A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202991461U (en) * | 2012-12-25 | 2013-06-12 | 上海清河机械有限公司 | Fluid end assembly of plunger pump |
| CN104564646A (en) * | 2014-12-18 | 2015-04-29 | 南京松本水处理技术有限公司 | Sealing device for plunger pump and plunger pump |
| CN207470777U (en) * | 2017-10-18 | 2018-06-08 | 江苏飞跃机泵集团有限公司 | A kind of stuffing seal for being used to seal the strong volatility toxic liquid of deep-etching |
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