High-pressure pump plunger movement anti-jetting structure
By setting ring grooves and capsules in the cylinder of the high-pressure pump, combined with the design of elastic membrane and ring plate, the liquid medium jetting problem caused by wear of the plunger and cylinder is solved, and a higher service life and safety are achieved.
Patent Information
- Application Number
- CN202420746134.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-10
AI Technical Summary
When the high-pressure pump is used for a long time, the contact area between the plunger and the cylinder block will be caused by wear, causing liquid media to be ejected through the gap, affecting surrounding objects.
A high-pressure pump plunger is designed to prevent jetting from moving, including setting up an annular groove on the inside of the cylinder and fixing the capsule, communicating with the annular groove, and tightly fitting the capsule with the annular groove through the capsule and preventing the liquid medium from being sprayed through the gap, and further reducing the jetting of the liquid medium through the combination of the elastic film and the ring plate.
It effectively reduces the ejection of liquid media through the gap between the cylinder block and the plunger rod, and improves the service life and safety of the high-pressure pump.
Smart Images
Figure CN222596280U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of high-pressure pump plunger structures, in particular to a high-pressure pump plunger movement anti-jetting structure. Background Art
[0002] The high-pressure pump is the core component of high-end hydraulic equipment. It is mainly composed of oil suction valve body, cylinder body, plunger, oil discharge valve body, return spring and other parts. It achieves the purpose of conveying liquid by relying on the periodic change of volume in the working chamber.
[0003] When the high-pressure pump is running, the plunger will slide repeatedly inside the cylinder, causing the rodless cavity space in the cylinder to repeatedly expand or decrease. When the rodless cavity space in the cylinder expands, the negative pressure generated will suck the external liquid into the cylinder through a one-way valve. When the rodless cavity space decreases, the liquid in the cylinder will be squeezed out through another one-way valve. The purpose of conveying liquid is achieved through repeated circulation. However, after long-term use, the contact part between the plunger and the cylinder will produce a gap due to wear. As a result, when the plunger slides into the cylinder, the liquid in the rodless cavity of the cylinder will spray out through the gap between the cylinder and the plunger, thereby affecting the surrounding objects.
[0004] To this end, the utility model provides a high-pressure pump plunger movement anti-injection structure. Utility Model Content
[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.
[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes a high-pressure pump plunger movement anti-injection structure, comprising a cylinder body; a plunger rod is slidably connected to the middle part of the cylinder body; an annular groove is provided at the inner middle part of the cylinder body; the annular groove is arranged at the sliding fit between the cylinder body and the plunger rod; a capsule is fixedly connected to the inside of the annular groove; a plurality of through pipes are provided inside the cylinder body; the plurality of through pipes are all connected to the annular groove; the other end of the through pipe is connected to the rodless cavity of the cylinder body; through the above structure, it is difficult for the liquid medium in the rodless cavity of the cylinder body to pass through between the capsule and the plunger rod, thereby reducing the occurrence of the liquid medium passing through the gap between the cylinder body and the plunger rod and being ejected.
[0007] Preferably, an elastic membrane is fixedly connected to one end of the cylinder body facing the plunger rod; the other end of the elastic membrane is fixedly connected to the middle part of the plunger rod; the cylinder body is provided with a ring plate fixedly connected to one end of the plunger rod; the ring plate is located on the outside of the elastic membrane; the diameter of the end of the ring plate close to the cylinder body is larger than the diameter of the end away from the cylinder body; through the above structure, the occurrence of liquid medium being ejected through the gap between the cylinder body and the plunger rod can be further reduced.
[0008] Preferably, a rubber block is fixed to the side wall of the capsule; the rubber block is arranged on the side of the capsule facing the plunger rod; through the above structure, the occurrence of damage to the capsule due to friction can be reduced.
[0009] Preferably, a plurality of fixing rods are fixedly connected to the interior of the capsule; the plurality of fixing rods are arranged to point toward the rubber block; through the above structure, the occurrence of liquid medium passing between the plunger rod and the rubber block can be further reduced, and the occurrence of liquid medium spraying can be further reduced.
[0010] Preferably, a metal ring is fixedly connected to the middle of the elastic membrane; the diameter of the metal ring is larger than the minimum distance between the ring plate and the plunger rod; through the above structure, the occurrence of liquid injection caused by the rupture of the plunger rod is reduced.
[0011] Preferably, the side wall of the rubber block is provided with an angle groove; the angle groove is arranged on the side of the rubber block close to the rodless cavity of the cylinder body; through the above structure, the occurrence of liquid medium passing through and ejecting from between the plunger rod and the rubber block is further reduced.
[0012] The beneficial effects of the utility model are as follows:
[0013] 1. The utility model discloses a structure for preventing the piston from moving during high-pressure pump injection. When the plunger rod moves toward the inside of the cylinder body, the liquid medium in the rodless cavity of the cylinder body will flow into the inside of the annular groove through the through pipe to squeeze the capsule, so that one side of the capsule will expand toward the direction of the plunger rod and fit tightly with the middle part of the plunger rod, making it difficult for the liquid medium in the rodless cavity of the cylinder body to pass through between the capsule and the plunger rod, thereby reducing the occurrence of the liquid medium passing through the gap between the cylinder body and the plunger rod and being injected.
[0014] 2. The utility model discloses a high-pressure pump plunger movement anti-injection structure, which blocks the liquid medium through an elastic membrane to make it difficult for it to flow to the outside. When the elastic membrane expands to a certain extent, the elastic membrane will be blocked by the ring plate, making it difficult for the elastic membrane to expand uncontrollably. Through the above structure, the occurrence of liquid medium being ejected through the gap between the cylinder body and the plunger rod can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The utility model will be further described below in conjunction with the accompanying drawings.
[0016] Figure 1 It is a three-dimensional diagram of the utility model;
[0017] Figure 2 This is a schematic diagram of the cylinder structure of the utility model;
[0018] Figure 3 This is a schematic diagram of the ring groove structure in the utility model;
[0019] Figure 4 This is a schematic diagram of the elastic membrane structure of the utility model;
[0020] In the figure: 1, cylinder body; 12, plunger rod; 13, ring groove; 14, capsule; 15, through pipe; 2, elastic membrane; 21, ring plate; 3, rubber block; 4, fixing rod; 5, metal ring; 6, angle groove; 7, anti-slip pattern. DETAILED DESCRIPTION
[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0022] like Figures 1 to 3 As shown, a high-pressure pump plunger movement anti-injection structure described in an embodiment of the utility model comprises a cylinder body 1; a plunger rod 12 is slidably connected to the middle of the cylinder body 1; an annular groove 13 is provided in the middle of the inner side of the cylinder body 1; the annular groove 13 is arranged at the sliding fit between the cylinder body 1 and the plunger rod 12; a capsule 14 is fixedly connected to the inside of the annular groove 13; a plurality of through pipes 15 are provided inside the cylinder body 1; the plurality of through pipes 15 are all connected to the annular groove 13; the other end of the through pipe 15 is connected to the rodless cavity of the cylinder body 1; when working, when the plunger rod 12 moves in a direction away from the cylinder body 1, the inside of the cylinder body 1 will be sucked in Liquid medium, when the plunger rod 12 moves toward the inside of the cylinder body 1, the liquid medium in the rodless cavity of the cylinder body 1 will be squeezed out of the cylinder body 1, and at this time, part of the liquid medium will flow into the inside of the annular groove 13 through the through pipe 15. At this time, the strong hydraulic pressure will squeeze the capsule 14, causing one side of the capsule 14 to expand toward the direction of the plunger rod 12, so that the side wall of the capsule 14 will fit tightly with the middle part of the plunger rod 12, making it difficult for the liquid medium in the rodless cavity of the cylinder body 1 to pass through between the capsule 14 and the plunger rod 12, thereby reducing the occurrence of the liquid medium passing through the gap between the cylinder body 1 and the plunger rod 12 and being ejected.
[0023] like Figures 1 to 4As shown, the end of the cylinder body 1 facing the plunger rod 12 is fixedly connected with an elastic membrane 2; the other end of the elastic membrane 2 is fixedly connected to the middle of the plunger rod 12; the end of the cylinder body 1 provided with the plunger rod 12 is fixedly connected with a ring plate 21; the ring plate 21 is located on the outside of the elastic membrane 2; the diameter of the end of the ring plate 21 close to the cylinder body 1 is larger than the diameter of the end away from the cylinder body 1; when working, when the plunger rod 12 moves toward the inside of the cylinder body 1, part of the liquid medium inside the cylinder body 1 will be squeezed into the gap between the cylinder body 1 and the plunger rod 12 and be elastically The elastic membrane 2 is blocked by the elastic membrane 2 and is difficult to flow to the outside. At this time, the elastic membrane 2 will expand. When the elastic membrane 2 expands to a certain extent, the elastic membrane 2 will be blocked by the ring plate 21, making it difficult for the elastic membrane 2 to expand uncontrollably. When the plunger rod 12 moves in a direction away from the cylinder body 1, the elastic membrane 2 will be stretched. At this time, part of the liquid medium inside the elastic membrane 2 will be sucked into the rodless cavity of the cylinder body 1 again through the gap between the cylinder body 1 and the plunger rod 12. Through the above structure, the occurrence of liquid medium ejected through the gap between the cylinder body 1 and the plunger rod 12 can be further reduced.
[0024] like Figures 1 to 3 As shown, the side wall of the capsule 14 is fixedly connected with a rubber block 3; the rubber block 3 is arranged on the side of the capsule 14 facing the plunger rod 12; during operation, as the capsule 14 expands, the rubber block 3 will be squeezed toward the plunger rod 12 by the capsule 14, so that contact is generated between the rubber block 3 and the plunger rod 12, and at this time, the rubber block 3 will replace the capsule 14 to rub against the middle part of the plunger rod 12, which can reduce the occurrence of damage of the capsule 14 due to friction.
[0025] like Figures 1 to 3 As shown, a plurality of fixing rods 4 are fixedly connected to the interior of the capsule 14; the plurality of fixing rods 4 are arranged to point to the rubber block 3; during operation, as the liquid medium is squeezed, the side of the capsule 14 away from the plunger rod 12 will be deformed, and the force applied to the connection between the capsule 14 and the fixing rod 4 is relatively large, and then through the conduction of the fixing rod 4, the squeezing force applied to the rubber block 3 can be made stronger, and then the combination of the rubber block 3 and the plunger rod 12 can be made tighter. Through the above structure, the occurrence of the liquid medium passing between the plunger rod 12 and the rubber block 3 can be further reduced, and the occurrence of the liquid medium spraying can be further reduced.
[0026] like Figures 1 to 4 As shown, a metal ring 5 is fixedly connected to the middle part of the elastic membrane 2; the diameter of the metal ring 5 is larger than the minimum spacing between the ring plate 21 and the plunger rod 12; during operation, as the elastic membrane 2 expands and deforms, the metal ring 5 will be blocked between the ring plate 21 and the plunger rod 12, making it difficult for the middle part of the elastic membrane 2 to expand out from the gap between the elastic membrane 2 and the plunger rod 12, thereby reducing the occurrence of liquid injection caused by the rupture of the plunger rod 12.
[0027] like Figures 1 to 3 As shown, a corner groove 6 is provided on the side wall of the rubber block 3; the corner groove 6 is arranged on the side of the rubber block 3 close to the rodless cavity of the cylinder body 1; during operation, when the liquid medium inside the rodless cavity of the cylinder body 1 is squeezed by the plunger rod 12, part of the liquid medium will squeeze the rubber block 3 through the gap between the cylinder body 1 and the plunger rod 12, and at this time, the liquid medium inside the corner groove 6 will squeeze the end of the rubber block 3, thereby increasing the fit between the end of the rubber block 3 and the plunger rod 12, and further reducing the occurrence of the liquid medium passing through and ejecting from between the plunger rod 12 and the rubber block 3.
[0028] like Figure 4 As shown, the ring plate 21 is provided with a plurality of anti-slip grooves 7 inside; the plurality of anti-slip grooves 7 are evenly distributed inside the ring plate 21; during operation, when the elastic membrane 2 is expanded by force, the outer portion of the elastic membrane 2 will fit with the inner portion of the ring plate 21, and the presence of the plurality of anti-slip grooves 7 can increase the friction between the ring plate 21 and a portion of the outer wall of the elastic membrane 2, making it difficult for this portion of the elastic membrane 2 to slide, thereby enabling the metal ring 5 to more accurately block the gap between the ring plate 21 and the plunger rod 12.
[0029] During operation, when the plunger rod 12 moves in a direction away from the cylinder body 1, liquid medium will be drawn into the cylinder body 1. When the plunger rod 12 moves in the direction away from the cylinder body 1, the liquid medium in the rodless cavity of the cylinder body 1 will be squeezed out of the cylinder body 1. At this time, part of the liquid medium will flow into the annular groove 13 through the through pipe 15. At this time, the strong hydraulic pressure will squeeze the capsule 14, so that one side of the capsule 14 will expand in the direction of the plunger rod 12, so that the side wall of the capsule 14 will fit tightly with the middle part of the plunger rod 12, making it difficult for the liquid medium in the rodless cavity of the cylinder body 1 to flow out. The liquid medium passes between the capsule 14 and the plunger rod 12. When the plunger rod 12 moves toward the inside of the cylinder body 1, part of the liquid medium inside the cylinder body 1 will be squeezed into the space between the elastic membrane 2 and the plunger rod 12 through the gap between the cylinder body 1 and the plunger rod 12, and will be blocked by the elastic membrane 2 and will be difficult to flow to the outside. At this time, the elastic membrane 2 will expand. When the elastic membrane 2 expands to a certain extent, the elastic membrane 2 will be blocked by the ring plate 21, making it difficult for the elastic membrane 2 to expand uncontrollably. When the plunger rod 12 moves in a direction away from the cylinder body 1, the elastic membrane 2 will be stretched. At this time, the elastic membrane 2 Part of the internal liquid medium will be sucked into the rodless cavity of the cylinder body 1 again through the gap between the cylinder body 1 and the plunger rod 12. As the capsule 14 expands, the rubber block 3 will be squeezed toward the plunger rod 12 by the capsule 14, so that the rubber block 3 and the plunger rod 12 come into contact. At this time, the rubber block 3 will replace the capsule 14 to rub against the middle part of the plunger rod 12. As the liquid medium is squeezed, the side of the capsule 14 away from the plunger rod 12 will be deformed, and the force applied to the connection between the capsule 14 and the fixed rod 4 is relatively large, so the extrusion force applied to the rubber block 3 can be conducted by the fixed rod 4. The elastic membrane 2 is expanded and deformed, and the metal ring 5 is blocked between the ring plate 21 and the plunger rod 12, making it difficult for the middle part of the elastic membrane 2 to expand out from the gap between the elastic membrane 2 and the plunger rod 12. When the liquid medium inside the rodless cavity of the cylinder body 1 is squeezed by the plunger rod 12, part of the liquid medium will squeeze the rubber block 3 through the gap between the cylinder body 1 and the plunger rod 12. At this time, the liquid medium inside the angle groove 6 will squeeze the end of the rubber block 3, thereby increasing the fit between the end of the rubber block 3 and the plunger rod 12.
[0030] The above shows and describes the basic principles, 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 for explaining the principles of 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 claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A high-pressure pump plunger movement anti-injection structure, comprising a cylinder body (1); characterized in that: The middle part of the cylinder body (1) is slidably connected with a plunger rod (12); an annular groove (13) is provided in the middle part of the inner side of the cylinder body (1); the annular groove (13) is arranged at the sliding fit between the cylinder body (1) and the plunger rod (12); a capsule (14) is fixedly connected inside the annular groove (13); a plurality of through pipes (15) are provided inside the cylinder body (1); the plurality of through pipes (15) are all connected with the annular groove (13); the other end of the through pipe (15) is connected with the rodless cavity of the cylinder body (1).
2. A high-pressure pump plunger motion anti-injection structure according to claim 1, characterized in that: An elastic membrane (2) is fixedly connected to one end of the cylinder body (1) facing the plunger rod (12); the other end of the elastic membrane (2) is fixedly connected to the middle part of the plunger rod (12); the cylinder body (1) is provided with a ring plate (21) fixedly connected to one end of the plunger rod (12); the ring plate (21) is located on the outside of the elastic membrane (2); the diameter of the end of the ring plate (21) close to the cylinder body (1) is larger than the diameter of the end away from the cylinder body (1).
3. A high-pressure pump plunger motion anti-injection structure according to claim 2, characterized in that: A rubber block (3) is fixedly connected to the side wall of the capsule (14); the rubber block (3) is arranged on the side of the capsule (14) facing the plunger rod (12).
4. A high-pressure pump plunger motion anti-injection structure according to claim 3, characterized in that: A plurality of fixing rods (4) are fixedly connected inside the capsule (14); the plurality of fixing rods (4) are arranged to point toward the rubber block (3).
5. A high-pressure pump plunger motion anti-injection structure according to claim 4, characterized in that: A metal ring (5) is fixedly connected to the middle of the elastic membrane (2); the diameter of the metal ring (5) is larger than the minimum distance between the ring plate (21) and the plunger rod (12).
6. A high-pressure pump plunger motion anti-injection structure according to claim 5, characterized in that: The side wall of the rubber block (3) is provided with an angle groove (6); the angle groove (6) is arranged on a side of the rubber block (3) close to the rodless cavity of the cylinder body (1).