Isolation components

Abstract

The present invention discloses an isolation component, which includes: a seat body, a sealing cylinder, a plunger, a plurality of first sealing rings and a sliding sealing ring. The seat body has a first chamber, a plunger hole and a second chamber. The seat body is provided with a detection channel. The sealing cylinder is arranged in the plunger hole. The sealing cylinder is provided with a guide groove that connects the central through hole of the sealing cylinder with the detection channel. The plunger is slidably arranged in the central through hole of the sealing cylinder. The first sealing rings are arranged at intervals on the wall of the plunger hole and abut against the outer peripheral wall of the sealing cylinder. The sliding sealing rings are arranged at intervals on the inner peripheral wall of the sealing cylinder and abut against the outer peripheral wall of the plunger. The connection between the detection channel and the plunger hole is located between any two adjacent first sealing rings, and the connection between the guide groove and the sealing cylinder is located between any two adjacent sliding sealing rings. According to the liquid flowing out of the detection channel, the sealing failure position is effectively detected. In addition, multiple first sealing rings and sliding sealing rings are provided to improve the effectiveness of liquid isolation.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical pumps, and in particular to an isolation component. Background Art

[0002] The high-pressure, high-flow emulsion pump is a hydraulic power source designed for the fully mechanized mining face support equipment of large coal enterprises. It is a key equipment for achieving high production and high efficiency of the working face. The continuity, stability and reliability of its operation are of great significance to ensuring the safe production of coal enterprises and improving economic benefits.

[0003] The emulsion pump relies on the rotation of the crankshaft to drive the piston to do reciprocating motion to achieve liquid suction and discharge. In order to prevent the cross-mixing of the oil at the hydraulic end and the power end of the emulsion pump, a sealing isolation structure is set at the moving part of the piston to separate the liquid (high-pressure water, etc.) at the hydraulic end from the lubricating oil at the power end. The sealing structure in the related art is usually not suitable for high-pressure sealing, and there is no measure to deal with medium leakage when the seal fails, and it is not possible to intuitively detect the location where the seal problem occurs. Summary of the invention

[0004] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0005] In the related art, a steel sleeve is placed on the plunger, and a guide sleeve and a sealing ring are placed between the steel sleeve and the plunger to separate the liquid on both sides of the plunger. This sealing isolation structure is not suitable for high-pressure sealing. Moreover, when the seal fails, there is no measure to deal with the leakage of the medium, and the position of the sealing ring with the sealing problem cannot be intuitively detected. In addition, the sealing isolation structure makes it difficult to replace the damaged seal, and the replacement efficiency is low.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, an embodiment of the present invention provides an isolation assembly, which is suitable for use in high-pressure sealing environments and achieves effective liquid isolation. In addition, when liquid leakage occurs, there are safety protection measures and means for detecting the specific seal failure position. In addition, damaged seals can be easily replaced.

[0008] The isolation assembly of the embodiment of the present invention comprises: a seat body, a sealing cylinder, a plunger, a plurality of first sealing rings and a plurality of sliding sealing rings, the seat body is provided with a first chamber, a plunger hole and a second chamber which are connected in sequence, the seat body is provided with a detection channel, one end of the detection channel is connected with the plunger hole, and the other end of the detection channel is connected with the outside, the sealing cylinder is arranged in the plunger hole, the sealing cylinder is provided with a guide groove which connects the central through hole of the sealing cylinder with the detection channel, at least a part of the plunger is slidably arranged in the central through hole of the sealing cylinder along the axial direction of the sealing cylinder, and the plurality of the first sealing rings are provided. The rings are arranged on the hole wall of the plunger hole at intervals along the axial direction of the plunger hole and are abutted against the outer circumferential wall of the sealing tube. A plurality of sliding sealing rings are arranged on the inner circumferential wall of the sealing tube at intervals along the axial direction of the sealing tube and are abutted against the outer circumferential wall of the plunger. The first sealing ring and the sliding sealing ring are used to block the mutual circulation of liquid in the first chamber and liquid in the second chamber. The connection between the detection channel and the plunger hole is located between any two adjacent first sealing rings, and the connection between the guide groove and the central through hole of the sealing tube is located between any two adjacent sliding sealing rings.

[0009] The isolation component of the embodiment of the present invention has a detection channel opened on the base body. When the sliding seal ring used to isolate the liquid in the first chamber fails, the liquid flowing out through the detection channel is the liquid in the first chamber. Conversely, when the sliding seal ring used to isolate the liquid in the second chamber fails, the liquid flowing out through the detection channel is the liquid in the second chamber. In addition, when the liquid flowing out of the detection channel is a mixture of the liquids in the first chamber and the second chamber, it means that the sliding seal rings have failed. Thereby, the sealing failure position is effectively detected. Moreover, by providing multiple first seal rings and sliding seal rings, the effectiveness of isolating the liquids in the first chamber and the second chamber is further improved.

[0010] Thus, the isolation assembly of the embodiment of the present invention solves the problem of detecting the location of seal failure.

[0011] In some embodiments, an annular guide groove is provided on the inner circumferential wall of the sealing cylinder, a guide sleeve is clamped in the guide groove, and at least a portion of the guide sleeve protrudes from the guide groove and abuts against the outer circumferential wall of the plunger.

[0012] In some embodiments, the seat body includes a first valve seat and a second valve seat, the first valve seat is detachably connected to the second valve seat, and the first end surface of the first valve seat is engaged with the first end surface of the second valve seat; the plunger hole includes a first hole portion and a second hole portion that are connected, the first hole portion is located on the first valve seat, and the second hole portion is located on the second valve seat; a first groove that is connected to the first hole portion is provided on the first end surface of the first valve seat, and a second groove that is connected to the second hole portion is provided on the first end surface of the second valve seat, the first groove and the second groove are arranged opposite to each other, the first groove and the second groove together constitute a limiting groove, and a protrusion that fits into the limiting groove is provided on the outer peripheral wall of the sealing tube.

[0013] In some embodiments, an annular engaging sealing groove is provided on the first end surface of the first valve seat and / or the first end surface of the second valve seat, a second sealing ring is provided in the engaging sealing groove, and at least part of the second sealing ring protrudes out of the engaging sealing groove and abuts against the first end surface of the first valve seat and / or the first end surface of the second valve seat.

[0014] In some embodiments, the plunger hole also includes a third hole portion connected to the first hole portion, the third hole portion is located on a side of the first hole portion away from the second hole portion, the diameter of the third hole portion is smaller than the diameter of the first hole portion so that a step is formed at the junction of the hole wall of the third hole portion and the hole wall of the first hole portion, and the sealing tube is provided with a clamping copper ring at one end of its axial direction close to the step, and the clamping copper ring is abutted against the step surface of the step.

[0015] In some embodiments, the seat body is provided with an exhaust hole, one end of the exhaust hole is connected to the outside and is provided with an exhaust plug, and the other end of the exhaust hole is connected to the plunger hole; the first sealing ring adjacent to the second chamber among the multiple first sealing rings is a chamber sealing ring, and the connection between the exhaust hole and the plunger hole is located between the chamber sealing ring and the second chamber.

[0016] In some embodiments, a low-pressure water flow channel is provided on the seat body, and a water groove is provided on the sealing cylinder to connect the central through hole of the sealing cylinder with the low-pressure water flow channel, the end of the water groove connected to the central through hole of the sealing cylinder is a hydrophobic end, and the end of the guide groove connected to the central through hole of the sealing cylinder is a detection end, the hydrophobic end is located on the side of the detection end close to the first chamber, and a sliding sealing ring is provided between the hydrophobic end and the detection end.

[0017] In some embodiments, a plurality of annular static sealing grooves are provided on the hole wall of the plunger hole, and the plurality of static sealing grooves correspond one-to-one to the plurality of first sealing rings, and at least a portion of the first sealing ring is stuck in the static sealing grooves.

[0018] In some embodiments, a plurality of annular dynamic sealing grooves are provided on the inner circumferential wall of the sealing cylinder, and the plurality of dynamic sealing grooves correspond one-to-one to the plurality of sliding sealing rings, and at least a portion of the sliding sealing rings is clamped in the dynamic sealing grooves.

[0019] In some embodiments, the sliding seal is a step seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of an isolation assembly according to an embodiment of the present invention.

[0021] Figure 2 Schematic diagram of a seat body of an isolation assembly according to an embodiment of the present invention.

[0022] Figure 3 Schematic diagram of a sealing cylinder of an isolation assembly according to an embodiment of the present invention.

[0023] Figure 4 is a schematic diagram of an isolation assembly according to another embodiment of the present invention.

[0024] Reference numerals:

[0025] Seat body 1, first valve seat 11, first chamber 111, second valve seat 12, second chamber 121, plunger hole 13, first hole portion 131, second hole portion 132, third hole portion 133, limiting groove 134, detection channel 14, exhaust hole 15, joint sealing groove 16, static sealing groove 17, low-pressure water flow channel 18,

[0026] Sealing cylinder 2, dynamic sealing groove 21, guide groove 22, guide groove 23, detection end 231, water tank 24, hydrophobic end 241, protrusion 25,

[0027] Plunger 3, first sealing ring 4, second sealing ring 5, sliding sealing ring 6, guide sleeve 7, and clamping copper ring 8. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0029] The isolation assembly of the embodiment of the present invention is described below with reference to the accompanying drawings.

[0030] like Figure 1 As shown, the isolation assembly of the embodiment of the present invention includes: a seat body 1, a sealing cylinder 2, a plunger 3, a plurality of first sealing rings 4 and a plurality of sliding sealing rings 6.

[0031] The seat body 1 has a first chamber 111, a plunger hole 13 and a second chamber 121 which are connected in sequence. The seat body 1 is provided with a detection channel 14, one end of which is connected to the plunger hole 13, and the other end of which is connected to the outside. The sealing cylinder 2 is arranged in the plunger hole 13, and the sealing cylinder 2 is provided with a guide groove 23 which connects the central through hole of the sealing cylinder 2 with the detection channel 14. At least part of the plunger 3 is slidably arranged in the central through hole of the sealing cylinder 2 along the axial direction of the sealing cylinder 2. A plurality of first sealing rings 4 are arranged on the hole wall of the plunger hole 13 at intervals along the axial direction of the plunger hole 13 and abut against the outer peripheral wall of the sealing cylinder 2, and a plurality of sliding sealing rings 6 are arranged on the inner peripheral wall of the sealing cylinder 2 at intervals along the axial direction of the sealing cylinder 2 and abut against the outer peripheral wall of the plunger 3. The first sealing ring 4 and the sliding sealing ring 6 are used to prevent the liquid in the first chamber 111 from flowing with the liquid in the second chamber 121. The connection point between the detection channel 14 and the plunger hole 13 is located between any two adjacent first sealing rings 4 , and the connection point between the guide groove 23 and the central through hole of the sealing cylinder 2 is located between any two adjacent sliding sealing rings 6 .

[0032] Optionally, the isolation assembly of the embodiment of the present invention can be used in a reciprocating piston pump or a radial piston pump to isolate the water or emulsion medium at the hydraulic end of the piston pump from the lubricating oil at the power end. It should be understood that the liquid in the first chamber 111 is the water or emulsion medium, and the liquid in the second chamber 121 is the lubricating oil. The setting direction of the isolation assembly is determined according to the type of the piston pump, for example, Figure 1 As shown, the isolation assembly is arranged in the up-down direction as a whole. This type of isolation assembly is used to isolate the radial piston pump. Figure 4 As shown, the isolation assembly is arranged along the left-right direction as a whole. This type of isolation assembly is used to isolate the reciprocating piston pump.

[0033] Among them, the sealing cylinder 2 is located in the plunger hole 13, at least part of the plunger 3 is arranged in the central through hole of the sealing cylinder 2, and the plunger 3 reciprocates in the central through hole of the sealing cylinder 2. There is a gap between the outer peripheral wall of the sealing cylinder 2 and the hole wall of the plunger hole 13, and the first sealing ring 4 is arranged between the outer peripheral wall of the sealing cylinder 2 and the hole wall of the plunger hole 13, so as to prevent the liquid in the first chamber 111 and the liquid in the second chamber 121 from circulating and mixing through the gap between the sealing cylinder 2 and the plunger hole 13. There is also a gap between the outer peripheral wall of the plunger 3 and the inner peripheral wall of the sealing cylinder 2, and the sliding sealing ring 6 is arranged between the outer peripheral wall of the plunger 3 and the inner peripheral wall of the sealing cylinder 2, so as to prevent the liquid in the first chamber 111 and the liquid in the second chamber 121 from circulating and mixing through the gap between the plunger 3 and the sealing cylinder 2.

[0034] Alternatively, if Figure 2As shown, the first chamber 111 is located above the second chamber 121. The plunger hole 13 is arranged in the up-down direction, the plunger hole 13 is located between the first chamber 111 and the second chamber 121, the upper end of the plunger hole 13 is connected to the first chamber 111, and the lower end of the plunger hole 13 is connected to the second chamber 121.

[0035] Specifically, Figure 1 As shown, the sealing cylinder 2 is arranged in the up-down direction, and the central axis of the sealing cylinder 2 is coaxial with the central axis of the plunger hole 13. The plunger 3 is slidably arranged in the central through hole of the sealing cylinder 2 in the up-down direction, and the central axis of the plunger 3 is coaxial with the central axis of the sealing cylinder 2.

[0036] It can be understood that the plurality of first sealing rings 4 are arranged at intervals along the axial direction of the sealing cylinder 2. Since the sealing cylinder 2 is fixedly arranged in the plunger hole 13, the sealing cylinder 2 and the seat body 1 are both in a stationary state. Therefore, the sealing relationship between the sealing cylinder 2 and the seat body 1 is a static seal. The plurality of sliding sealing rings 6 are arranged at intervals along the axial direction of the plunger 3. During the reciprocating sliding process of the plunger 3, the sealing relationship between the plunger 3 and the sliding sealing ring 6 is a dynamic seal.

[0037] Optionally, the length of the sealing cylinder 2 is determined according to the reciprocating sliding range of the plunger 3, thereby determining the number of the first sealing ring 4 and the sliding sealing ring 6, thereby ensuring the effectiveness of the sealing structure. In addition, by providing multiple sliding sealing rings 6, it is avoided that the failure of one sliding sealing ring 6 causes the sealing failure of the entire sealing structure.

[0038] Specifically, Figure 1 As shown, there are two first sealing rings 4, which are arranged at intervals along the axial direction of the sealing cylinder 2. There are three sliding sealing rings 6, which are arranged at intervals along the axial direction of the plunger 3.

[0039] Optionally, the detection channel 14 is arranged along the radial direction of the plunger hole 13, and the guide groove 23 is arranged along the radial direction of the sealing tube 2. One end of the detection channel 14 located on the hole wall of the plunger hole 13 is connected with one end of the guide groove 23 located on the outer peripheral wall of the sealing tube 2, so that the liquid in the guide groove 23 can flow to the outside through the detection channel 14, and then the specific location of the sealing failure can be determined according to the liquid flowing out of the detection channel 14.

[0040] Specifically, Figure 1 and Figure 3As shown, an annular flow guide groove 23 is provided on the outer peripheral wall of the sealing cylinder 2, the central axis of the flow guide groove 23 is coaxial with the central axis of the sealing cylinder 2, and the extension direction of the flow guide groove 23 is consistent with the radial direction of the sealing cylinder 2. Four flow guide holes are provided at the bottom of the flow guide groove 23, and the four flow guide holes are distributed at intervals around the circumference of the flow guide groove 23, and the extension direction of the flow guide holes is consistent with the radial direction of the sealing cylinder 2, and the flow guide holes connect the flow guide groove 23 with the central through hole of the sealing cylinder 2.

[0041] Furthermore, the detection channel 14 , the guide groove 23 and the guide hole are all located on the same plane, so that the liquid in the guide groove 23 can flow into the detection channel 14 , thereby promptly and effectively discovering the sealing failure of the sliding sealing ring 6 .

[0042] The detection channel 14 is arranged in the left-right direction, the left end of the detection channel 14 is connected to the outside, and the right end of the detection channel 14 is located on the hole wall of the plunger hole 13 and between the two first sealing rings 4. The right end of the detection channel 14 is connected to the guide groove 23, and the guide groove 23 is located between the first sliding sealing ring 6 and the second sliding sealing ring 6 from bottom to top. When the seal fails, the leaked liquid enters the guide groove 23 through the guide hole, and then flows into the detection channel 14 through the guide groove 23.

[0043] Therefore, when the liquid flowing out of the detection channel 14 is water, it indicates that the sliding seal ring 6 located above the guide groove 23 has failed. When the liquid flowing out of the detection channel 14 is lubricating oil, it indicates that the sliding seal ring 6 located below the guide groove 23 has failed.

[0044] The isolation component of the embodiment of the present invention has a detection channel 14 opened on the base body 1. When the sliding seal 6 used to isolate the liquid in the first chamber 111 fails, the liquid flowing out through the detection channel 14 is the liquid in the first chamber 111. On the contrary, when the sliding seal 6 used to isolate the liquid in the second chamber 121 fails, the liquid flowing out through the detection channel 14 is the liquid in the second chamber 121. In addition, when the liquid flowing out of the detection channel 14 is a mixture of the liquids in the first chamber 111 and the second chamber 121, it means that the sliding seal 6 has failed. Thereby, the sealing failure position is effectively detected. In addition, by providing multiple first seals 4 and sliding seals 6, the effectiveness of isolating the liquids in the first chamber 111 and the second chamber 121 is further improved.

[0045] In some embodiments, Figure 1 and Figure 3 As shown, an annular guide groove 22 is provided on the inner peripheral wall of the sealing cylinder 2 , and a guide sleeve 7 is clamped in the guide groove 22 . At least part of the guide sleeve 7 protrudes from the guide groove 22 and abuts against the outer peripheral wall of the plunger 3 .

[0046] The guide sleeve 7 guides the reciprocating sliding process of the plunger 3. In addition, at least part of the guide sleeve 7 protrudes from the guide groove 22, thereby preventing the outer peripheral wall of the plunger 3 from directly contacting the inner peripheral wall of the sealing cylinder 2, thereby preventing the sealing cylinder 2 from scratching the plunger 3 during the reciprocating sliding process of the plunger 3.

[0047] Optionally, the number of guide grooves 22 is determined according to the reciprocating sliding range of the plunger 3. The larger the reciprocating sliding range of the plunger 3, the more guide grooves 22 and guide sleeves 7 there are, so as to better play a guiding role.

[0048] Specifically, Figure 1 and Figure 3 As shown, two guide grooves 22 are provided on the inner circumferential wall of the sealing cylinder 2. The two guide grooves 22 are arranged at intervals along the axial direction of the sealing cylinder 2, one of which is located at the upper part of the sealing cylinder 2, and the other is located at the lower part of the sealing cylinder 2. The guide groove 22 is annular, and the central axis of the guide groove 22 is coaxial with the central axis of the sealing cylinder 2. A guide sleeve 7 is clamped in each of the two guide grooves 22, and the inner circumferential wall of the guide sleeve 7 abuts against the outer circumferential wall of the plunger 3.

[0049] In some embodiments, Figure 1 and Figure 2 As shown, the seat body 1 includes a first valve seat 11 and a second valve seat 12. The first valve seat 11 is detachably connected to the second valve seat 12. The first end surface of the first valve seat 11 (eg Figure 1 The lower end surface of the first valve seat 11) and the first end surface of the second valve seat 12 (such as Figure 1 The plunger hole 13 includes a first hole portion 131 and a second hole portion 132 that are connected to each other. The first hole portion 131 is located on the first valve seat 11, and the second hole portion 132 is located on the second valve seat 12. A first groove that is connected to the first hole portion 131 is provided on the first end surface of the first valve seat 11, and a second groove that is connected to the second hole portion 132 is provided on the first end surface of the second valve seat 12. The first groove and the second groove are arranged opposite to each other, and the first groove and the second groove together form a limiting groove 134. A protrusion 25 that fits in the limiting groove 134 is provided on the outer peripheral wall of the sealing tube 2.

[0050] It can be understood that when the first valve seat 11 is connected to the second valve seat 12, the sealing cylinder 2 is fixed in the plunger hole 13 under the limiting effect of the protrusion 25 and the limiting groove 134. When the first valve seat 11 is disconnected from the second valve seat 12, the sealing cylinder 2 can be conveniently taken out from the plunger hole 13, thereby achieving the purpose of convenient replacement of the isolation assembly after the sealing failure of the embodiment of the present invention.

[0051] Specifically, Figure 2As shown, the first valve seat 11 is located above the second valve seat 12. The first hole portion 131 is located on the first valve seat 11, and the lower end of the first hole portion 131 is located on the lower end surface of the first valve seat 11. The second hole portion 132 is located on the second valve seat 12, and the upper end of the second hole portion 132 is located on the upper end surface of the second valve seat 12. The lower end of the first hole portion 131 is connected to the upper end of the second hole portion 132.

[0052] Furthermore, if Figure 1 and Figure 2 As shown, a first groove is provided on the lower end surface of the first valve seat 11, the first groove extends in the up-down direction, and the first groove is communicated with the first hole portion 131. A second groove is provided on the upper end surface of the second valve seat 12, the second groove extends in the up-down direction, and the second groove is communicated with the second hole portion 132. The first groove and the second groove together form a limiting groove 134, and an annular protrusion 25 is provided on the outer peripheral wall of the sealing cylinder 2 to fit in the limiting groove 134.

[0053] In some embodiments, an annular joining sealing groove 16 is provided on the first end surface of the first valve seat 11 and / or the first end surface of the second valve seat 12, and a second sealing ring 5 is provided in the joining sealing groove 16. At least part of the second sealing ring 5 protrudes from the joining sealing groove 16 and abuts against the first end surface of the first valve seat 11 and / or the first end surface of the second valve seat 12.

[0054] It is understandable that the first end face of the first valve seat 11 is joined with the first end face of the second valve seat 12, and no sealing treatment is performed between the two end faces. The liquid in the first chamber 111 or the second chamber 121 will flow out from the gap between the two end faces, thereby reducing the sealing performance of the sealing structure.

[0055] Therefore, the second sealing ring 5 is provided between the first end surface of the first valve seat 11 and the first end surface of the second valve seat 12 to seal the gap between the two end surfaces. In addition, the sealing relationship between the first end surface of the first valve seat 11 and the first end surface of the second valve seat 12 is a static seal.

[0056] Optionally, an annular joint sealing groove 16 is provided on the first end surface of the first valve seat 11 and / or the first end surface of the second valve seat 12. For example, an annular joint sealing groove 16 is provided on the first end surface of the first valve seat 11. Alternatively, an annular joint sealing groove 16 is provided on the first end surface of the second valve seat 12. Alternatively, an annular joint sealing groove 16 is provided on both the first end surface of the first valve seat 11 and the first end surface of the second valve seat 12.

[0057] Specifically, Figure 1 and Figure 2As shown, an annular joint sealing groove 16 is provided on the lower end surface of the first valve seat 11 and the upper end surface of the second valve seat 12, thereby achieving a multiple sealing effect. The joint sealing groove 16 on the lower end surface of the first valve seat 11 is the first joint sealing groove 16, and the joint sealing groove 16 on the upper end surface of the second valve seat 12 is the second joint sealing groove 16. The central axis of the first joint sealing groove 16 is coaxial with the central axis of the plunger hole 13, the central axis of the first joint sealing groove 16 is coaxial with the central axis of the second joint sealing groove 16, and the diameter of the first joint sealing groove 16 is smaller than the diameter of the second joint sealing groove 16. A second sealing ring 5 is clamped in the first joint sealing groove 16, and the upper end of the second sealing ring 5 protrudes from the first joint sealing groove 16 and abuts against the upper end surface of the second valve seat 12. A second sealing ring 5 is also clamped in the second joint sealing groove 16, and the upper end of the second sealing ring 5 protrudes from the second joint sealing groove 16 and abuts against the lower end surface of the first valve seat 11. Thus, a multiple sealing effect is achieved.

[0058] In some embodiments, Figure 1 and Figure 2 As shown, the plunger hole 13 also includes a third hole portion 133 connected to the first hole portion 131. The third hole portion 133 is located on a side of the first hole portion 131 away from the second hole portion 132. The diameter of the third hole portion 133 is smaller than the diameter of the first hole portion 131 so that a step is formed at the junction of the hole wall of the third hole portion 133 and the hole wall of the first hole portion 131. A clamping copper ring 8 is sleeved on one end of the sealing tube 2 in its axial direction close to the step, and the clamping copper ring 8 is abutted against the step surface of the step.

[0059] It can be understood that by providing the compression copper ring 8 to further seal and compress the gap between the sealing cylinder 2 and the plunger hole 13, high-pressure static sealing is achieved, and the isolation assembly of the embodiment of the present invention can be used in a high-pressure use environment.

[0060] Specifically, Figure 1 and Figure 2 As shown, the third hole portion 133 is located above the first hole portion 131. The upper end of the third hole portion 133 is connected to the first chamber 111, and the lower end of the third hole portion 133 is connected to the upper end of the first hole portion 131. The diameter of the third hole portion 133 is smaller than the diameter of the first hole portion 131 so that a step is formed at the junction of the hole wall of the third hole portion 133 and the hole wall of the first hole portion 131. The upper end of the sealing cylinder 2 is sleeved with a clamping copper ring 8, and the clamping copper ring 8 is against the step surface and the hole wall of the first hole portion 131.

[0061] In some embodiments, Figure 1 and Figure 2As shown, the seat body 1 is provided with an exhaust hole 15, one end of the exhaust hole 15 is connected to the outside and is provided with an exhaust plug, and the other end of the exhaust hole 15 is connected to the plunger hole 13. The first sealing ring 4 adjacent to the second chamber 121 among the plurality of first sealing rings 4 is a chamber sealing ring, and the connection between the exhaust hole 15 and the plunger hole 13 is located between the chamber sealing ring and the second chamber 121.

[0062] It is understandable that the exhaust plug is used to block the exhaust hole 15. When the lubricating oil is injected into the second chamber 121, the exhaust plug can be opened to allow the gas in the second chamber 121 to be exhausted through the exhaust hole 15.

[0063] Specifically, Figure 1 and Figure 2 As shown, the exhaust hole 15 is arranged in the left-right direction. The left end of the exhaust hole 15 is connected to the outside, and a detachable exhaust plug is provided at the left end of the exhaust hole 15. The right end of the exhaust hole 15 is connected to the plunger hole 13, and the right end of the exhaust hole 15 is located below the first first sealing ring 4 from bottom to top.

[0064] Furthermore, if Figure 1 As shown, the junction between the outer peripheral wall of the sealing cylinder 2 and the lower surface of the sealing cylinder 2 has a chamfer, so that the gap between the outer peripheral wall of the lower end of the sealing cylinder 2 and the hole wall of the plunger hole 13 is increased, thereby improving the exhaust efficiency.

[0065] In some embodiments, Figures 1 to 3 As shown, the seat body 1 is provided with a low-pressure water flow channel 18 (not shown in the figure), and the sealing cylinder 2 is provided with a water groove 24 that connects the central through hole of the sealing cylinder 2 with the low-pressure water flow channel 18. The end of the water groove 24 connected to the central through hole of the sealing cylinder 2 is a hydrophobic end 241, and the end of the guide groove 23 connected to the central through hole of the sealing cylinder 2 is a detection end 231. The hydrophobic end 241 is located on the side of the detection end 231 close to the first chamber 111, and a sliding sealing ring 6 is provided between the hydrophobic end 241 and the detection end 231.

[0066] It is understandable that the low-pressure water flow channel 18 is connected to the low-pressure water source of the emulsion pump system, and the low-pressure water flow channel 18 is not shown in the figure. The water tank 24 is located between two adjacent sliding seals 6. When the sliding seal 6 on the side of the water tank 24 close to the first chamber 111 fails, high-pressure water will flow into the low-pressure water flow channel 18 through the water tank 24, so that the isolation component of the embodiment of the present invention has a safety protection measure to deal with the leakage of high-pressure liquid, thereby improving the safety performance.

[0067] Specifically, Figure 1 and Figure 3As shown, an annular water groove 24 is provided on the outer peripheral wall of the sealing cylinder 2, the central axis of the water groove 24 is coaxial with the central axis of the sealing cylinder 2, and the extension direction of the water groove 24 is consistent with the radial direction of the sealing cylinder 2. Four water through holes are provided at the bottom of the water groove 24, and the four water through holes are distributed at intervals around the circumference of the water groove 24, and the extension direction of the water through holes is consistent with the radial direction of the sealing cylinder 2, and the water through holes connect the water groove 24 with the central through hole of the sealing cylinder 2.

[0068] Furthermore, if Figure 1 and Figure 3 As shown, the water tank 24 is located between the first sliding seal ring 6 and the second sliding seal ring 6 from top to bottom. It should be understood that the detection end 231 is the bottom end of the guide groove 23, the hydrophobic end 241 is the bottom end of the water tank 24, and there is a sliding seal ring 6 between the hydrophobic end 241 and the detection end 231.

[0069] Therefore, when the sliding seal ring 6 above the water tank 24 fails, the high-pressure water in the first chamber 111 enters the water tank 24 through the water through hole, and then flows into the low-pressure water flow channel 18 through the water tank 24. At this time, since the sliding seal ring 6 below the water tank 24 has not failed, the high-pressure water in the first chamber 111 will not flow into the detection channel 14.

[0070] In some embodiments, Figure 1 and Figure 2 As shown, a plurality of annular static sealing grooves 17 are provided on the hole wall of the plunger hole 13, and the plurality of static sealing grooves 17 correspond to the plurality of first sealing rings 4 one by one, and at least a portion of the first sealing ring 4 is clamped in the static sealing groove 17. In other words, the first sealing ring 4 is clamped in the static sealing groove 17, and at least a portion of the first sealing ring 4 protrudes from the static sealing groove 17, and the inner peripheral wall of the first sealing ring 4 abuts against the outer peripheral wall of the sealing cylinder 2 to achieve a sealing effect.

[0071] In some embodiments, Figure 1 and Figure 3 As shown, a plurality of annular dynamic sealing grooves 21 are provided on the inner peripheral wall of the sealing cylinder 2, and the plurality of dynamic sealing grooves 21 correspond to the plurality of sliding sealing rings 6 one by one, and at least a portion of the sliding sealing ring 6 is clamped in the dynamic sealing groove 21. In other words, the sliding sealing ring 6 is clamped in the dynamic sealing groove 21, and at least a portion of the sliding sealing ring 6 protrudes from the dynamic sealing groove 21, and the inner peripheral wall of the sliding sealing ring 6 abuts against the outer peripheral wall of the plunger 3 to achieve a sealing effect.

[0072] Furthermore, the sliding sealing ring 6 is a step seal, and the first sealing ring 4 and the second sealing ring 5 are both O-shaped rubber sealing rings.

[0073] In other embodiments, Figure 4As shown, the isolation assembly applicable to the reciprocating piston pump 3 is specifically described. The isolation assembly includes a seat body 1, a sealing cylinder 2, a plunger 3, a first sealing ring 4, a second sealing ring 5, a sliding sealing ring 6 and a guide sleeve 7.

[0074] The seat body 1 has a first chamber 111 (not shown in the figure), a plunger hole 13, and a second chamber 121 (not shown in the figure) which are connected in sequence. The plunger hole 13 is arranged in the left-right direction, the first chamber 111 is located on the left side of the plunger hole 13, and the second chamber 121 is located on the right side of the plunger hole 13. The seat body 1 is provided with a detection channel 14, which is located below the plunger hole 13, the upper end of the detection channel 14 is connected to the plunger hole 13, and the lower end of the detection channel 14 is connected to the outside.

[0075] The sealing cylinder 2 is arranged in the plunger hole 13, and a guide groove 23 is provided on the sealing cylinder 2 to connect the central through hole of the sealing cylinder 2 with the detection channel 14. At least part of the plunger 3 is slidably arranged in the central through hole of the sealing cylinder 2 along the axial direction of the sealing cylinder 2, the left end of the plunger 3 is located in the first chamber 111, and the right end of the plunger 3 is located in the second chamber 121.

[0076] There are four first sealing rings 4, which are arranged on the hole wall of the plunger hole 13 at intervals along the left-right direction and abut against the outer peripheral wall of the sealing tube 2. The upper end of the detection channel 14 is located between the first first sealing ring 4 and the second first sealing ring 4 from right to left.

[0077] The seat body 1 includes a first valve seat 11 (not shown) and a second valve seat 12, wherein the right end surface of the first valve seat 11 is in contact with the left end surface of the second valve seat 12. There is one second sealing ring 5, which is arranged on the left end surface of the second valve seat 12 and abuts against the right end surface of the first valve seat 11.

[0078] There are three sliding sealing rings 6, which are arranged at intervals along the left-right direction on the inner circumferential wall of the sealing cylinder 2 and abut against the outer circumferential wall of the plunger 3. The connection between the guide groove 23 and the central through hole of the sealing cylinder 2 is located between the first sliding sealing ring 6 and the second sliding sealing ring 6 from right to left.

[0079] There are two guide sleeves 7, which are arranged on the inner peripheral wall of the sealing cylinder 2 at intervals along the left-right direction and abut against the outer peripheral wall of the plunger 3. Three sliding sealing rings 6 are located between the two guide sleeves 7. The central axes of the first sealing ring 4, the second sealing ring 5, the sliding sealing ring 6 and the guide sleeve 7 are all coaxial with the central axis of the sealing cylinder 2.

[0080] The seat body 1 is also provided with a low-pressure water flow channel 18, and the low-pressure water flow channel 8 is located below the plunger hole 13. The low-pressure water flow channel 18 includes a vertical section and a horizontal section, the upper end of the vertical section is connected to the plunger hole 13, the lower end of the vertical section is connected to the right end of the horizontal section, and the left end of the horizontal section is located on the left end surface of the second valve seat 12. The sealing cylinder 2 is provided with a water tank 24 that connects the central through hole of the sealing cylinder 2 with the upper end of the vertical section, and the connection between the water tank 24 and the central through hole of the sealing cylinder 2 is located between the first sliding sealing ring 6 and the second sliding sealing ring 6 from left to right.

[0081] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0085] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An isolation component, characterized in that: include: A seat body, wherein the seat body has a first chamber, a plunger hole, and a second chamber that are connected in sequence, and the seat body is provided with a detection channel, one end of the detection channel is connected to the plunger hole, and the other end of the detection channel is connected to the outside; A sealing cylinder, the sealing cylinder is arranged in the plunger hole, and the sealing cylinder is provided with a guide groove connecting the central through hole of the sealing cylinder with the detection channel; A plunger, at least a portion of which is slidably disposed in the central through hole of the sealing cylinder along the axial direction of the sealing cylinder; A plurality of first sealing rings and a plurality of sliding sealing rings, wherein the plurality of first sealing rings are arranged on the hole wall of the plunger hole at intervals along the axial direction of the plunger hole and abut against the outer peripheral wall of the sealing cylinder, and the plurality of sliding sealing rings are arranged on the inner peripheral wall of the sealing cylinder at intervals along the axial direction of the sealing cylinder and abut against the outer peripheral wall of the plunger, and the first sealing rings and the sliding sealing rings are used to block the mutual circulation of the liquid in the first chamber and the liquid in the second chamber, the connection between the detection channel and the plunger hole is located between any two adjacent first sealing rings, and the connection between the guide groove and the central through hole of the sealing cylinder is located between any two adjacent sliding sealing rings; The seat body is provided with a low-pressure water flow channel, the sealing cylinder is provided with a water groove connecting the central through hole of the sealing cylinder with the low-pressure water flow channel, the water groove is located between the two sliding sealing rings, the end of the water groove connected with the central through hole of the sealing cylinder is a hydrophobic end, the end of the guide groove connected with the central through hole of the sealing cylinder is a detection end, the hydrophobic end is located on the side of the detection end close to the first chamber, and the sliding sealing ring is provided between the hydrophobic end and the detection end; The seat body comprises a first valve seat and a second valve seat, the first valve seat is detachably connected to the second valve seat, and a first end surface of the first valve seat is engaged with a first end surface of the second valve seat; The plunger hole comprises a first hole portion and a second hole portion which are connected to each other, the first hole portion is located on the first valve seat, and the second hole portion is located on the second valve seat; A first groove communicating with the first hole portion is provided on the first end surface of the first valve seat, and a second groove communicating with the second hole portion is provided on the first end surface of the second valve seat. The first groove and the second groove are arranged opposite to each other, and the first groove and the second groove together constitute a limiting groove. A protrusion that fits in the limiting groove is provided on the outer peripheral wall of the sealing tube.

2. The isolation assembly according to claim 1, characterized in that An annular guide groove is arranged on the inner peripheral wall of the sealing cylinder, a guide sleeve is clamped in the guide groove, and at least a part of the guide sleeve protrudes out of the guide groove and abuts against the outer peripheral wall of the plunger.

3. The isolation assembly according to claim 1, characterized in that An annular joint sealing groove is provided on the first end surface of the first valve seat and / or the first end surface of the second valve seat, and a second sealing ring is provided in the joint sealing groove. At least part of the second sealing ring protrudes from the joint sealing groove and abuts against the first end surface of the first valve seat and / or the first end surface of the second valve seat.

4. The isolation assembly according to claim 1, characterized in that The plunger hole also includes a third hole portion connected to the first hole portion, the third hole portion is located on a side of the first hole portion away from the second hole portion, the diameter of the third hole portion is smaller than the diameter of the first hole portion so that a step is formed at the junction of the hole wall of the third hole portion and the hole wall of the first hole portion, and a clamping copper ring is sleeved on one end of the sealing tube in its axial direction close to the step, and the clamping copper ring is abutted against the step surface of the step.

5. The isolation assembly according to claim 1, characterized in that The seat body is provided with an exhaust hole, one end of which is connected to the outside and is provided with an exhaust plug, and the other end of which is connected to the plunger hole; The first sealing ring adjacent to the second chamber among the plurality of first sealing rings is a chamber sealing ring, and the connection point between the exhaust hole and the plunger hole is located between the chamber sealing ring and the second chamber.

6. The isolation assembly according to claim 1, characterized in that A plurality of annular static sealing grooves are provided on the hole wall of the plunger hole, and the plurality of static sealing grooves correspond one-to-one to the plurality of first sealing rings, and at least a portion of the first sealing ring is clamped in the static sealing grooves.

7. The isolation assembly according to claim 1, characterized in that A plurality of annular dynamic sealing grooves are arranged on the inner peripheral wall of the sealing cylinder. The plurality of dynamic sealing grooves correspond to the plurality of sliding sealing rings one by one. At least a part of the sliding sealing rings is clamped in the dynamic sealing grooves.

8. The isolation assembly according to any one of claims 1 to 7, characterized in that: The sliding sealing ring is a step seal.

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