Ultrahigh-pressure gap filler combined type reciprocating sealing device

Abstract

The utility model provides an ultrahigh pressure clearance filler combined reciprocating sealing device which comprises a bottom plate used for being inserted into a cylinder body, a plunger rod movably penetrates through the cylinder body, a filler cavity is formed in the cylinder body and located on the inner side wall of the plunger rod, and the bottom plate is inserted into the filler cavity and movably arranged outside the plunger rod in a sleeving mode. A connecting column is fixedly installed on the side, close to the opening end of the filler cavity, of the bottom plate. When the first sealing gasket and the second sealing gasket need to be detached and replaced, the connecting column is made to move towards the opening end of the filler cavity through the driving piece, and when the end of the connecting column is located on the outer side of the cylinder body, the bottom plate can be driven to move towards the opening end of the filler cavity by pulling the connecting column. Therefore, the first sealing gasket and the second sealing gasket can be driven to move in the direction of the opening end of the filler cavity, the first sealing gasket and the second sealing gasket can be detached, the first sealing gasket and the second sealing gasket can be detached conveniently, and the detaching and replacing difficulty of the first sealing gasket and the second sealing gasket is lowered.

Description

Technical Field

[0001] This utility model relates to the field of sealing equipment technology, specifically to an ultra-high pressure gap packing combined reciprocating sealing device. Background Technology

[0002] Packing seals are mainly used for dynamic sealing of moving parts of process machines and equipment in the machinery industry, such as shaft seals of centrifugal pumps, compressors, vacuum pumps, mixers, and reactors, as well as piston rods of reciprocating pumps and compressors, and seals between valve stems and stationary bodies of valves that perform linear or helical motion.

[0003] For example, the accompanying diagram in the instruction manual. Figure 5 The diagram shows the internal structure of a prior art ultra-high pressure gap packing combined reciprocating sealing device, including a base plate for insertion into a cylinder. A plunger rod movably passes through the cylinder. A packing cavity is formed on the inner wall of the cylinder and located on the inner side of the plunger rod. The base plate is inserted into the packing cavity and movably sleeved on the outside of the plunger rod. Sealing gasket 1, sealing gasket 2, and an abutment block are inserted into the packing cavity and sleeved on the outside of the plunger rod. Sealing gasket 1, sealing gasket 2, and the abutment block are arranged sequentially along the opening end of the packing cavity. The outer walls of the base plate, sealing gasket 1, sealing gasket 2, and the abutment block are all in contact with the inner wall of the packing cavity, and the inner walls are all in contact with the outer wall of the plunger rod. An elastic component is installed in the packing cavity that abuts against both sealing gasket 1 and sealing gasket 2. The cylinder is close to the packing cavity. A series of threaded columns are fixedly installed in a ring array on one side of the opening end of the material chamber. Four threaded columns are movably fitted with packing glands that abut against the piston rod. The packing glands can abut against the contact blocks. Nuts are connected to the external threads of the threaded columns. In use, the packing glands abut against the contact blocks, causing sealing gaskets one and two to abut against the inner wall of the packing chamber and the outer wall of the piston rod, achieving a sealing effect between the cylinder and the piston rod. Furthermore, by incorporating an elastic component, both ends of which abut against sealing gaskets one and two respectively, both sealing gaskets one and two deform under stress, which helps maintain the fit between sealing gaskets one and two and the inner wall of the packing chamber and the outer wall of the piston rod. However, in actual use, the following defects still exist:

[0004] Under long-term use, the friction between sealing gaskets 1 and 2 and the plunger rod can easily lead to a decrease in the fit between sealing gaskets 1 and 2 and the plunger rod, resulting in poor sealing between sealing gaskets 1 and 2 and the plunger rod. Therefore, it is necessary to disassemble and replace sealing gaskets 1 and 2. In the existing ultra-high pressure gap packing combination reciprocating sealing device, disassembling sealing gaskets 1 and 2 is inconvenient because they are located inside the packing cavity, thus increasing the difficulty of disassembling and replacing sealing gaskets 1 and 2.

[0005] Therefore, this application proposes an ultra-high pressure gap packing combined reciprocating sealing device. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an ultra-high pressure gap packing combined reciprocating sealing device, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-pressure gap packing combined reciprocating sealing device includes a base plate for insertion into a cylinder body, a plunger rod that moves through the cylinder body, a packing cavity being formed in the cylinder body and on the inner side wall of the plunger rod, and the base plate being inserted into the packing cavity and movably sleeved on the outside of the plunger rod.

[0009] A connecting column is fixedly installed on the side of the base plate near the opening end of the packing cavity. A driving component that can be connected to the bottom wall of the packing cavity is installed on the connecting column, which is used to move the connecting column towards the opening end of the packing cavity. A sealing gasket 1, a sealing gasket 2, a positioning ring and an abutment block are inserted into the packing cavity and sleeved on the outside of the plunger rod. The sealing gasket 1, the sealing gasket 2, the positioning ring and the abutment block are arranged sequentially along the opening end of the packing cavity. The outer walls of the base plate, the sealing gasket 1, the sealing gasket 2, the positioning ring and the abutment block are all in contact with the inner wall of the packing cavity, and the inner walls are all in contact with the outer wall of the plunger rod.

[0010] The cylinder body has threaded columns fixedly installed in a ring array on the side near the opening end of the packing chamber. A packing gland is movably sleeved on the four threaded columns and is fitted outside the plunger rod. The packing gland can abut against the contact block. Nuts are connected to the external threads of the threaded columns.

[0011] Furthermore: the driving component includes a driving rod threaded through the connecting column along the direction of the base plate, and a through hole is provided on the base plate, with the end of the driving rod movably passing through the through hole.

[0012] Furthermore, the outer walls of the sealing gasket one, sealing gasket two, and positioning ring are all provided with relief grooves, and the cross sections of the outer wall of the connecting column and the multiple relief grooves are all in contact.

[0013] Furthermore: A rubber pad 1 is fixedly installed at the bottom of the base plate, which is in contact with the bottom wall of the packing cavity. A through hole connected to the perforation is opened on the rubber pad 1, and the end of the driving rod moves through the through hole. A rubber pad 2 that can abut against the positioning ring is fixedly installed at the bottom of the abutting block. The outer side walls of both rubber pad 1 and rubber pad 2 are in contact with the inner side wall of the packing cavity, and the inner side walls are in contact with the outer side wall of the plunger rod.

[0014] Furthermore: the end of the drive rod is rotatably connected to a connecting block extending into the through hole, and a rubber pad that can be hidden into the through hole is fixedly installed on the side of the connecting block away from the drive rod.

[0015] Furthermore: the side of the contact block away from the rubber pad has multiple locking holes arranged in a ring array, and multiple positioning rods are fixedly installed in a ring array on the filler cap. The multiple positioning rods correspond one-to-one with the multiple locking holes, and the positioning rods can be inserted into the locking holes and fit against the cross section of the contact block.

[0016] Furthermore, the packing cavity is equipped with an elastic component that abuts against both sealing gasket one and sealing gasket two.

[0017] Furthermore: the elastic component includes a retaining ring and a spring. There are two retaining rings, and a spring is fixedly connected between the two retaining rings on their adjacent sides. Both the retaining rings and the spring are sleeved on the outside of the plunger rod, and the two retaining rings respectively form contact with sealing gasket one and sealing gasket two.

[0018] This invention provides an ultra-high pressure gap packing combined reciprocating sealing device. Compared with the prior art, it has the following advantages:

[0019] 1. When it is necessary to disassemble and replace sealing gasket 1 and sealing gasket 2, the connecting column is moved towards the opening end of the packing cavity by the driving component. When the end of the connecting column is located outside the cylinder body, pulling the connecting column will drive the base plate to move towards the opening end of the packing cavity, thereby driving sealing gasket 1 and sealing gasket 2 to move towards the opening end of the packing cavity, so as to disassemble sealing gasket 1 and sealing gasket 2. This facilitates the disassembly of sealing gasket 1 and sealing gasket 2 and reduces the difficulty of disassembling and replacing sealing gasket 1 and sealing gasket 2.

[0020] 2. By setting up a connecting block and rubber pad three, when the driving rod is rotated so that the bottom of the driving rod through the perforation abuts against the bottom wall of the packing cavity, the rubber pad three abuts against the bottom wall of the packing cavity, so that the driving rod and the bottom wall of the packing cavity make flexible contact, effectively avoiding wear on the bottom wall of the packing cavity. In addition, the rotation between the connecting block and the driving rod is beneficial to applying a rotational force to the driving rod, which is beneficial to displace the connecting column towards the opening end of the packing cavity.

[0021] 3. By setting up an elastic component, the two ends of the elastic component form contact with sealing gasket one and sealing gasket two respectively, so that sealing gasket one and sealing gasket two are deformed under force, which helps to maintain the fit between sealing gasket one and sealing gasket two and the inner wall of the packing cavity and the outer wall of the plunger rod. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown;

[0024] Figure 2 A schematic diagram of the internal structure of this utility model is shown;

[0025] Figure 3 This utility model illustrates Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This utility model illustrates Figure 2 Enlarged view of point B in the middle;

[0027] Figure 5 This diagram illustrates the internal structure of a prior art ultra-high pressure gap packing combined reciprocating sealing device.

[0028] The figure shows: 1. Base plate; 11. Perforation; 2. Cylinder block; 21. Piston rod; 22. Packing chamber; 23. Sealing gasket one; 24. Sealing gasket two; 25. Positioning ring; 26. Abutment block; 261. Locking hole; 27. Threaded post; 271. Nut; 28. Packing gland; 281. Positioning rod; 3. Connecting post; 4. Driving component; 41. Driving rod; 5. Rubber gasket one; 51. Through hole; 6. Rubber gasket two; 7. Connecting block; 71. Rubber gasket three; 8. Elastic component; 81. Retaining ring; 82. Spring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Example 1

[0031] To address the technical problems in the background section, the following ultra-high pressure gap packing combined reciprocating sealing device is provided:

[0032] Combination Figures 1-4As shown, the present invention provides an ultra-high pressure gap packing combined reciprocating sealing device, including a base plate 1, which is inserted into a cylinder 2. A plunger rod 21 is movably passed through the cylinder 2. A packing cavity 22 is opened in the cylinder 2 and located on the inner side wall of the plunger rod 21. The base plate 1 is inserted into the packing cavity 22 and movably sleeved on the outside of the plunger rod 21.

[0033] A connecting column 3 is fixedly installed on the side of the base plate 1 near the opening end of the packing cavity 22. A driving member 4 is installed on the connecting column 3, which can be connected to the bottom wall of the packing cavity 22. It is used to move the connecting column 3 towards the opening end of the packing cavity 22. A sealing gasket 1 23, a sealing gasket 24, a positioning ring 25 and an abutment block 26 are inserted into the packing cavity 22 and sleeved on the outside of the plunger rod 21. The sealing gasket 1 23, the sealing gasket 24, the positioning ring 25 and the abutment block 26 are arranged sequentially along the opening end of the packing cavity 22. The outer walls of the base plate 1, the sealing gasket 1 23, the sealing gasket 24, the positioning ring 25 and the abutment block 26 are all in contact with the inner wall of the packing cavity 22, and the inner walls are all in contact with the outer wall of the plunger rod 21. The sealing gasket 1 23 and the sealing gasket 24 are both made of rubber blocks.

[0034] The cylinder body 2 is fixedly installed in a ring array on the side near the opening end of the packing chamber 22 with threaded columns 27. The four threaded columns 27 are movably fitted with packing glands 28 that are fitted outside the plunger rod 21. The packing glands 28 can abut against the contact block 26. Nuts 271 are connected to the external threads of the threaded columns 27.

[0035] During assembly, the base plate 1, sealing gasket 23, sealing gasket 24, positioning ring 25, and contact block 26 are sequentially packed into the packing cavity 22. At this time, the base plate 1, sealing gasket 23, sealing gasket 24, positioning ring 25, and contact block 26 are all fitted over the plunger rod 21. Then, the packing gland 28 is fitted over the multiple threaded posts 27, so that the packing gland 28 abuts against the contact block 26. Nuts 271 are threaded onto the multiple threaded posts 27, so that the multiple nuts 271 abut against the packing gland 28. Thus, the positioning ring 25 and the base plate 1 abut against the sealing gasket 23 and sealing gasket 24, thereby ensuring the fit between the sealing gasket 23 and sealing gasket 24 and the inner wall of the packing cavity 22 and the outer wall of the plunger rod 21. This ensures good adhesion during long-term use. Under the friction between the sealing gasket 23 and the piston rod 21, the fit between the sealing gasket 23 and the piston rod 21 is reduced, and the sealing gasket 23 and the piston rod 21 needs to be disassembled and replaced. When the sealing gasket 23 and the piston rod 24 need to be disassembled and replaced, the connecting column 3 is moved towards the opening end of the packing cavity 22 by the driving component 4. When the end of the connecting column 3 is located outside the cylinder body 2, pulling the connecting column 3 can drive the base plate 1 to move towards the opening end of the packing cavity 22, thereby driving the sealing gasket 23 and the piston rod 24 to move towards the opening end of the packing cavity 22, so as to disassemble the sealing gasket 23 and the piston rod 24. This makes it easier to disassemble the sealing gasket 23 and the piston rod 24 and reduces the difficulty of disassembling and replacing the sealing gasket 23 and the piston rod 24.

[0036] Example 2

[0037] like Figures 1-4 As shown, based on the above embodiments, this embodiment further provides the following:

[0038] In this embodiment, the driving member 4 includes a driving rod 41 that is threaded through the connecting column 3 along the direction of the base plate 1. A through hole 11 is provided on the base plate 1, and the end of the driving rod 41 moves through the through hole 11. In use, the driving rod 41 is rotated to move threadedly on the connecting column 3. When the bottom of the driving rod 41 through the through hole 11 abuts against the bottom wall of the packing cavity 22, the connecting column 3 can be displaced towards the opening end of the packing cavity 22 under the reverse force. The operation is simple.

[0039] In this embodiment, the outer walls of the sealing gasket 23, the sealing gasket 24 and the positioning ring 25 are all provided with relief grooves. The cross sections of the outer wall of the connecting column 3 and the multiple relief grooves are all in contact, which does not affect the installation of the sealing gasket 23, the sealing gasket 24 and the positioning ring 25.

[0040] In this embodiment, a rubber pad 5 is fixedly installed at the bottom of the base plate 1, which is in contact with the bottom wall of the packing cavity 22. The rubber pad 5 has a through hole 51 that communicates with the through hole 11. The end of the driving rod 41 moves through the through hole 51. A rubber pad 6 is fixedly installed at the bottom of the abutment block 26, which can abut against the positioning ring 25. The outer walls of both the rubber pad 5 and the rubber pad 6 are in contact with the inner wall of the packing cavity 22, and the inner walls are in contact with the outer wall of the plunger rod 21. By setting rubber pad 5, the fit between the base plate 1 and the bottom wall of the packing cavity 22 is increased, and the sealing between the base plate 1 and the bottom wall of the packing cavity 22 is increased. By setting rubber pad 6, the fit between the contact block 26 and the positioning ring 25 is increased, and the sealing between the contact block 26 and the positioning ring 25 is increased. By setting through hole 51, the end of the driving rod 41 can move through the through hole 51, so as not to affect the contact between the end of the driving rod 41 and the bottom wall of the packing cavity 22.

[0041] Example 3

[0042] like Figures 1-4 As shown, based on the above embodiments, this embodiment further provides the following:

[0043] In this embodiment, the end of the driving rod 41 is rotatably connected to a connecting block 7 extending into the through hole 51. A rubber pad 71 that can be hidden in the through hole 51 is fixedly installed on the side of the connecting block 7 away from the driving rod 41. By setting the connecting block 7 and the rubber pad 71, when the driving rod 41 is rotated so that the bottom of the driving rod 41 passes through the through hole 11 and abuts against the bottom wall of the packing cavity 22, the rubber pad 71 abuts against the bottom wall of the packing cavity 22, so that the driving rod 41 and the bottom wall of the packing cavity 22 are in flexible contact, effectively avoiding wear on the bottom wall of the packing cavity 22. Furthermore, the rotation between the connecting block 7 and the driving rod 41 is beneficial to applying a rotational force to the driving rod 41, which is beneficial to displace the connecting column 3 towards the opening end of the packing cavity 22.

[0044] In this embodiment, the side of the abutment block 26 away from the rubber pad 26 has multiple locking holes 261 arranged in a ring array. The packing cover 28 has multiple positioning rods 281 fixedly installed in a ring array. The multiple positioning rods 281 correspond one-to-one with the multiple locking holes 261. The positioning rods 281 can be inserted into the locking holes 261 and are in contact with the cross section of the abutment block 26. By setting the positioning rods 281, when the packing cover 28 is installed, the multiple positioning rods 281 are inserted into the multiple locking holes 261 respectively, and the cross section of the positioning rods 281 is in contact with the abutment block 26, so as to realize the locking between the packing cover 28 and the abutment block 26, which is beneficial to the abutment positioning of the abutment block 26.

[0045] In this embodiment, an elastic component 8 is installed inside the packing cavity 22, which abuts against both sealing gasket 1 23 and sealing gasket 24. The elastic component 8 includes two fixing rings 81 and two springs 82. A spring 82 is fixedly connected between the two fixing rings 81 on their adjacent sides. Both the fixing rings 81 and the spring 82 are sleeved on the outside of the plunger rod 21. The two fixing rings 81 abut against sealing gasket 1 23 and sealing gasket 24 respectively. By setting the elastic component 8, both ends of the elastic component 8 abut against sealing gasket 1 23 and sealing gasket 24 respectively, causing sealing gasket 1 23 and sealing gasket 24 to deform under force, which helps to keep sealing gasket 1 23 and sealing gasket 24 in contact with each other. The fit between the inner wall of the packing cavity 22 and the outer wall of the plunger rod 21; during use, when the base plate 1, sealing gasket 1 23, sealing gasket 24, positioning ring 25 and abutment block 26 are packed into the packing cavity 22, the elastic component 8 is positioned between the opposite sides of sealing gasket 1 23 and sealing gasket 24, so that the packing gland 28 and the abutment block 26 form abutment. When sealing gasket 1 23 and sealing gasket 24 respectively apply abutment force to the two fixing rings 81, the spring 82 is deformed by force. During use, the spring 82 returns to its natural state, so that under the action of the spring 82, the two fixing rings 81 can be moved away from each other, so that the two fixing rings 81 form an abutment effect with sealing gasket 1 23 and sealing gasket 24 respectively.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A reciprocating sealing device with combined ultra-high pressure gap packing, characterized in that: Includes a base plate for insertion into a cylinder body, through which a plunger rod is movably inserted, and a packing cavity is provided in the cylinder body and on the inner side wall of the plunger rod. The base plate is inserted into the packing cavity and movably sleeved on the outside of the plunger rod. A connecting column is fixedly installed on the side of the base plate near the opening end of the packing cavity. A driving component that can be connected to the bottom wall of the packing cavity is installed on the connecting column, which is used to move the connecting column towards the opening end of the packing cavity. A sealing gasket 1, a sealing gasket 2, a positioning ring and an abutment block are inserted into the packing cavity and sleeved on the outside of the plunger rod. The sealing gasket 1, the sealing gasket 2, the positioning ring and the abutment block are arranged sequentially along the opening end of the packing cavity. The outer walls of the base plate, the sealing gasket 1, the sealing gasket 2, the positioning ring and the abutment block are all in contact with the inner wall of the packing cavity, and the inner walls are all in contact with the outer wall of the plunger rod. The cylinder body has threaded columns fixedly installed in a ring array on the side near the opening end of the packing chamber. A packing gland is movably sleeved on the four threaded columns and is fitted outside the plunger rod. The packing gland can abut against the contact block. Nuts are connected to the external threads of the threaded columns.

2. The ultra-high pressure gap packing combined reciprocating sealing device according to claim 1, characterized in that: The driving component includes a driving rod that is threaded through the connecting column along the direction of the base plate. A through hole is provided on the base plate, and the end of the driving rod moves through the through hole.

3. The ultra-high pressure gap packing combined reciprocating sealing device according to claim 1, characterized in that: The outer walls of the sealing gasket one, sealing gasket two, and positioning ring are all provided with relief grooves, and the cross sections of the outer wall of the connecting column and the multiple relief grooves are all in contact.

4. The ultra-high pressure gap packing combined reciprocating sealing device according to claim 2, characterized in that: A rubber pad 1 is fixedly installed at the bottom of the base plate, which is in contact with the bottom wall of the packing cavity. A through hole connected to the perforation is opened on the rubber pad 1, and the end of the driving rod moves through the through hole. A rubber pad 2 that can abut against the positioning ring is fixedly installed at the bottom of the abutting block. The outer side walls of both rubber pad 1 and rubber pad 2 are in contact with the inner side wall of the packing cavity, and the inner side walls are in contact with the outer side wall of the plunger rod.

5. The ultra-high pressure gap packing combined reciprocating sealing device according to claim 4, characterized in that: The end of the drive rod is rotatably connected to a connecting block extending into the through hole, and a rubber pad that can be hidden into the through hole is fixedly installed on the side of the connecting block away from the drive rod.

6. The ultra-high pressure gap packing combined reciprocating sealing device according to claim 4, characterized in that: The contact block has multiple locking holes arranged in a ring array on the side away from the rubber pad. Multiple positioning rods are fixedly installed in a ring array on the filler cap. Each positioning rod corresponds to one of the multiple locking holes. The positioning rods can be inserted into the locking holes and fit against the cross section of the contact block.

7. The ultra-high pressure gap packing combined reciprocating sealing device according to claim 1, characterized in that: The packing cavity is equipped with an elastic component that abuts against both sealing gasket one and sealing gasket two.

8. The ultra-high pressure gap packing combined reciprocating sealing device according to claim 7, characterized in that: The elastic component includes a retaining ring and a spring. There are two retaining rings, and a spring is fixedly connected between the two retaining rings on their adjacent sides. Both the retaining rings and the spring are sleeved on the outside of the plunger rod, and the two retaining rings abut against sealing gasket one and sealing gasket two, respectively.

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