Leakage-proof wear-resistant oil seal device for high-pressure pump

Abstract

The utility model discloses a leakproof wear-resistant oil seal device for a high-pressure pump, which comprises an emergency sealing mechanism mounted on the inner wall of a cylinder barrel, a plunger is movably mounted in the cylinder barrel, the inner wall of the cylinder barrel is provided with a mounting groove for mounting the emergency sealing mechanism, and the emergency sealing mechanism comprises a fixing ring, a sealing ring and a sealing ring. The utility model discloses a leakproof wear-resistant oil seal device for a high-pressure pump, which is characterized in that the leakproof wear-resistant oil seal device comprises a mounting groove and two fixing rings, the number of the fixing rings is two, the two fixing rings are respectively fixed at two ends of the mounting groove, and the two mounting rings are fixedly provided with sealing rings, the leakproof wear-resistant oil seal device for the high-pressure pump is additionally provided with an emergency sealing mechanism, so that when the main seal fails, the second seal can be quickly formed; impurities are effectively prevented from entering the pump body to cause damage, and reliability and safety of operation of the high-pressure pump are remarkably improved. Meanwhile, the sealing state is monitored in real time through the liquid contact sensor, potential leakage is found and early warned in time, the maintenance convenience of equipment is further improved, and the service life of the equipment is further prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure pump technical field, concretely is a kind of high pressure pump is with leakproof wear-resistant oil seal device. BACKGROUND

[0002] High pressure pump often uses plunger as the compression mechanism of gas, and is sealed by the precise small gap between the outer circle of plunger and cylinder mirror surface, combined with sufficient lubricating oil. However, although lubricating oil is provided between plunger and cylinder wall, the oil seal will still be worn after long time use, which is easy to cause liquid leakage in pump and external impurities to enter the pump.

[0003] Through the search, the high pressure sealing assembly structure of a kind of superhigh pressure pump's booster of Chinese invention patent with application No. 201910944462.1, by being provided with fastening ring between packing compression ring and sealing support ring, packing compression ring is blocked by oil seal support frame, cooperate with the two sides of fastening ring when water is pressed to left side, the sealing support ring with larger contact area with piston column will move to left side, and the inclined surface of fastening ring will be matched with the sealing support ring with stepped slope surface, so that the contact of sealing support ring and piston column is more and more tight, and a seal is formed.

[0004] For the prior art described above, the contact of sealing support ring and piston column is more and more tight by the action of water pressure, to achieve sealing effect, lack of emergency mechanism when the sealing effect fails, when the sealing fails, external impurities entering the pump will directly cause pump body damage.

[0005] Therefore, the utility model aims at providing a kind of high pressure pump is with leakproof wear-resistant oil seal device with emergency mechanism to solve the above problems. INVENTION CONTENTS

[0006] The utility model aims at the deficiencies of prior art, and provides a kind of high pressure pump is with leakproof wear-resistant oil seal device to solve the problems in the background art.

[0007] The utility model provides the following technical scheme: a kind of high pressure pump is with leakproof wear-resistant oil seal device, including the emergency sealing mechanism for being installed in the inner wall of cylinder barrel, the cylinder barrel is movably installed with plunger, the inner wall of the cylinder barrel is equipped with the installation groove for installing the emergency sealing mechanism, the emergency sealing mechanism includes:

[0008] Fixed ring, the number of the fixed ring is two, two the fixed ring is fixed in the two ends of the installation groove respectively, and two installation rings are fixed with sealing ring, two the sealing ring and the surface of the plunger are in close contact;

[0009] Connecting guide rod, the connecting guide rod is fixedly connected between two the fixed ring;

[0010] The sliding ring is in sliding connection with the connecting guide rod, and the number of the sliding rings is two, and the outer wall side surfaces of the two sliding rings are in sliding contact with the inner wall of the mounting groove and are kept in sealed connection;

[0011] The number of the clamping rings is two, and the two clamping rings are respectively in fixed connection with the two sliding rings, and the inner surfaces of the two clamping rings are both fixed with first sealing bands;

[0012] The surface of the plunger is fixed with a connecting ring, the two surfaces of the connecting ring are both fixed with second sealing bands, and the plunger drives the connecting ring to move between the two clamping rings when the plunger moves in the cylinder;

[0013] A tensioning mechanism is arranged between the two sliding rings, and the tensioning mechanism is used for tensioning the two clamping rings so that the two clamping rings are clamped on the two sides of the surface of the connecting ring.

[0014] Preferably, the tensioning mechanism is an electric telescopic rod.

[0015] Preferably, the O-shaped sealing rings are embedded in the outer wall side surfaces of the sliding rings and keep close contact with the inner wall of the mounting groove.

[0016] Preferably, the cylinder is fixedly connected with a valve body at one end, a through hole for inserting the plunger is formed between the valve body and the cylinder, a valve film is fixed in the through hole, and one end of the plunger is fixed with the valve film.

[0017] Preferably, a liquid contact sensor is arranged in the mounting groove.

[0018] Compared with the prior art, the high-pressure pump leak-proof wear-resistant oil seal device has the advantages that when the main seal fails, the second reseal can be quickly formed, impurities are effectively prevented from entering the pump body to cause damage, the reliability and safety of the high-pressure pump operation are significantly improved, the liquid contact sensor is used to monitor the sealing state in real time, the potential leakage is discovered and warned in time, and the maintenance convenience and service life of the equipment are further enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view of the sectional structure of the utility model.

[0020] Figure 2 It is a schematic view of the internal three-dimensional structure of the utility model.

[0021] Figure 3 It is a schematic view of the internal three-dimensional structure of the utility model. Figure 2 It is an enlarged structure schematic view of the middle A of the utility model.

[0022] In the figure: 1, valve body; 2, valve film; 3, sealing ring; 4, plunger; 5, fixed ring; 6, emergency sealing mechanism; 61, telescopic cylinder; 62, O-shaped sealing ring; 63, sliding ring; 64, clamping ring; 65, first sealing band; 66, connecting ring; 67, second sealing band; 68, connecting guide rod; 7, oil inlet; 8, cylinder barrel; 9, liquid contact sensor. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-3 The utility model discloses a leakproof wear-resistant oil seal device for high-pressure pump, including the emergency sealing mechanism 6 for installing in the inner wall of cylinder barrel 8, the plunger 4 is movably installed in the cylinder barrel 8, and the inner wall of the cylinder barrel 8 is provided with a mounting groove for installing the emergency sealing mechanism 6. The emergency sealing mechanism 6 can perform secondary sealing between the cylinder barrel 8 and the plunger 4 when the sealing between the plunger 4 and the cylinder barrel 8 fails, preventing impurities from entering the pump body.

[0025] In the embodiment, the emergency sealing mechanism 6 comprises:

[0026] The fixed ring 5 is used for installing the cylinder barrel 8, and the fixed ring 5 and the cylinder barrel 8 can be fixed by bolts or welding. The number of the fixed ring 5 is two, and the two fixed rings 5 are fixed at the two ends of the mounting groove. The two sealing rings 3 are fixed on the two fixed rings 5, and the two sealing rings 3 are in close contact with the surface of the plunger 4, thereby achieving the first resealing. It can be understood that in general work, one sealing can be achieved by the close contact between the sealing ring 3 and the plunger 4, and the structure of the sealing ring 3 is not limited.

[0027] The connecting guide rod 68 is fixedly connected between the two fixed rings 5 and serves as a connecting function.

[0028] The sliding ring 63 is in sliding connection with the connecting guide rod 68, and the number of the sliding ring 63 is two. The outer wall side surface of the sliding ring 63 is in sliding contact with and keeps sealed connection with the inner wall of the mounting groove. Specifically, the outer wall side surface of the sliding ring 63 is embedded with the O-shaped sealing ring 62, and the O-shaped sealing ring 62 keeps close contact with the inner wall of the mounting groove. Generally, the sliding ring 63 is static, that is, the O-shaped sealing ring 62 does not have friction with the inner wall of the mounting groove, and almost keeps in a brand-new state.

[0029] The clamping ring 64 is in fixed connection with the two sliding rings 63, and the inner surface of the clamping ring 64 is fixed with the first sealing band 65. The clamping ring 64 moves with the sliding ring 63. During normal work, the O-shaped sealing ring 62 keeps close contact with the inner wall of the mounting groove, and the sliding ring 63 and the clamping ring 64 do not move under the action of friction.

[0030] The surface of the plunger 4 is fixed with the connecting ring 66, and the two surfaces of the connecting ring 66 are fixed with the second sealing band 67. When the plunger 4 moves in the cylinder 8, the connecting ring 66 moves between the two clamping rings 64. It can be understood that when the first resealing is normal, the distance between the two clamping rings 64 is large enough, so that the plunger 4 does not touch any clamping ring 64 when moving.

[0031] The two sliding rings 63 are provided with the tensioning mechanism 61. The tensioning mechanism 61 is used for tensioning the two clamping rings 64, so that the two clamping rings 64 are clamped on both sides of the surface of the connecting ring 66. When the first resealing fails, the tensioning mechanism 61 reduces the distance between the two clamping rings 64. The connecting ring 66 is clamped by the two clamping rings 64. The first sealing band 65 and the second sealing band 67 are in close contact, so that the lubricating oil cannot pass between the connecting ring 66 and the inner wall of the mounting groove, that is, the inner wall of the cylinder 8 and the plunger 4. That is, the second resealing is generated. When the second resealing is generated, the connecting ring 66 moves and drives the two sliding rings 63 to move on the connecting guide rod 68, and always keeps in a sealed state, thereby achieving the effect of emergency sealing when the first resealing composed of the sealing ring 3 fails, effectively preventing impurities from passing through the gap between the plunger 4 and the cylinder 8 into the pump body.

[0032] In an embodiment of the present application, the tensioning mechanism 61 is an electric telescopic rod.

[0033] In one embodiment of the present application, one end of the cylinder 8 is fixedly connected with the valve body 1, one end of the valve body 1 is used for feeding, the other end is used for discharging, and one-way valves (not shown in the figure) are arranged at both ends of the valve body 1, a through hole for inserting the plunger 4 is formed between the valve body 1 and the cylinder 8, the valve film 2 is fixed in the through hole, one end of the valve film 2 is fixed with the plunger 4, and the plunger 4 drives the valve film 2 to expand and contract when reciprocating, so that the material enters from the feeding end of the valve body 1 and discharges from the discharging end, because it is the existing structure of the plunger type high-pressure pump, the specific principle will not be repeated here, and the emergency sealing mechanism 6 is arranged in the present application, when the first heavy sealing composed of the sealing ring 3 fails, the two clamping rings 64 can be clamped by the electric telescopic rod driving the connecting ring 66, completely blocking the gap between the plunger 4 and the inner wall of the cylinder 8, and the second heavy sealing is formed by the O-shaped sealing ring 62, the first sealing band 65 and the second sealing band 7, and since the second heavy sealing formed by the O-shaped sealing ring 62, the first sealing band 65 and the second sealing band 7 remains stationary when the first heavy sealing works, it is almost new, so it has good sealing effect, and the pump body is well protected from impurities entering.

[0034] The liquid contact sensor 9 is installed in the mounting groove, and the liquid contact sensor 9 detects the change of electrical conductivity or capacitance when liquid enters.

[0035] In summary, the utility model aims at realizing a kind of high-pressure pump leak-proof wear-resistant oil seal device with emergency mechanism to solve the problem that lack of emergency mechanism when sealing effect fails in prior art, and external impurities easily enter pump to cause damage.The device is provided with emergency sealing mechanism 6 on the inner wall of cylinder 8, including fixed ring 5, connecting guide rod 68, sliding ring 63, clamping ring 64 and tensioning mechanism 61 etc., when first heavy sealing fails, tensioning mechanism 61 can drive clamping ring 64 to clamp connecting ring 66, form second heavy sealing, effectively prevent impurities from entering pump body.Meanwhile, liquid contact sensor 9 arranged in mounting groove can monitor liquid entering condition in real time, further improve the reliability and safety of device.

[0036] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A leak-proof and wear-resistant oil seal device for a high-pressure pump, comprising an emergency sealing mechanism (6) for installation on the inner wall of a cylinder (8), wherein a plunger (4) is movably installed inside the cylinder (8), characterized in that: The inner wall of the cylinder (8) is provided with a mounting groove for installing the emergency sealing mechanism (6), the emergency sealing mechanism (6) comprising: The number of fixing rings (5) is two. The two fixing rings (5) are respectively fixed at both ends of the mounting groove, and the two mounting rings (5) are fixed with sealing rings (3). The two sealing rings (3) are in close contact with the surface of the plunger (4). A connecting guide rod (68) is fixedly connected between the two fixing rings (5); Sliding ring (63), the sliding ring (63) is slidably connected to the connecting guide rod (68), and there are two sliding rings (63). The outer side of the two sliding rings (63) slides in contact with the inner wall of the mounting groove and maintains a sealed connection. Clamping ring (64), there are two clamping rings (64), the two clamping rings (64) are fixedly connected to two sliding rings (63) respectively, and the inner surface of the two clamping rings (64) is fixed with a first sealing strip (65); The plunger (4) has a connecting ring (66) fixed on its surface. Both surfaces of the connecting ring (66) are fixed with a second sealing strip (67). When the plunger (4) moves in the cylinder (8), it drives the connecting ring (66) to move between the two clamping rings (64). A tensioning mechanism (61) is provided between the two sliding rings (63). The tensioning mechanism (61) is used to tighten the two clamping rings (64) so ​​that the two clamping rings (64) are clamped on both sides of the surface of the connecting ring (66).

2. The anti-leakage and wear-resistant oil seal device for a high-pressure pump according to claim 1, characterized in that: The tensioning mechanism (61) is an electric telescopic rod.

3. The anti-leakage and wear-resistant oil seal device for a high-pressure pump according to claim 1, characterized in that: An O-ring (62) is embedded in the outer side of the sliding ring (63), and the O-ring (62) is in close contact with the inner wall of the mounting groove.

4. The anti-leakage and wear-resistant oil seal device for a high-pressure pump according to claim 1, characterized in that: A valve body (1) is fixedly connected to one end of the cylinder (8). A through hole for the plunger (4) to be inserted is formed between the valve body (1) and the cylinder (8). A valve diaphragm (2) is fixed in the through hole. The valve diaphragm (2) is fixed to one end of the plunger (4).

5. The anti-leakage and wear-resistant oil seal device for a high-pressure pump according to claim 1, characterized in that: A liquid contact sensor (9) is installed in the mounting slot.

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