CN218468241U

CN218468241U - Differential pressure type reciprocating sliding sealing box

Info

Publication number: CN218468241U
Application number: CN202222783969.3U
Authority: CN
Inventors: 黎敦林; 张松坡
Original assignee: Suzhou Daichuang Filtration System Co ltd
Current assignee: Suzhou Daichuang Filtration System Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-02-10
Anticipated expiration: 2032-10-21

Abstract

The utility model relates to a differential pressure type reciprocating sliding sealing box, which comprises a sealing box main body, wherein a through hole for a transmission guide rod to pass through is arranged on the sealing box main body, and the sealing box main body, the transmission guide rod and an equipment top cover form the sealing of an equipment inner cavity; the through hole is a step through hole and comprises a first step hole section and a second step hole section which are arranged along the axial direction of the through hole, a first annular space and a second annular space are respectively formed between the first step hole section and the transmission guide rod, a sealing liquid passage and an overflow passage are arranged on the sealing box main body, one end of the sealing liquid passage is communicated with the outside, the other end of the sealing liquid passage is communicated with the first annular space, one end of the overflow passage is communicated with the outside, and the other end of the overflow passage is communicated with the second annular space. The utility model discloses a sealed box can be used to multiple inside for the sealed of the equipment of the double-phase fluid medium of solid-liquid that has pressure, can ensure that working medium does not take place to leak, guarantees that spare parts such as equipment push rod can not take place wearing and tearing, corruption, pollution and inefficacy because of working medium's leakage.

Description

Differential pressure type reciprocating sliding sealing box

Technical Field

The utility model belongs to the technical field of sealed letter technique and specifically relates to indicate a sealed letter of reciprocal slip of differential pressure formula.

Background

In the present industrial production field, all kinds of industrial equipment working under the solid-liquid two-phase fluid pressure working medium are, for example, reciprocating pumps, filters, solid-liquid separation devices and the like, wherein some solid-liquid two-phase fluid pressure working medium also has certain abrasiveness, corrosiveness or toxicity, and therefore, a transmission guide rod (a guide rod or a guide column and the like) working on the equipment needs to have reliable reciprocating motion sealing performance;

however, the sealing element adopted by many existing industrial equipments has a poor sealing effect on the transmission guide rod, and a working medium leakage condition often occurs after the equipment is used for a period of time, and meanwhile, the solid particles in the leaked working medium can accelerate the wear failure of the sealing element and the transmission guide rod, which not only affects the production efficiency, but also greatly increases the cost of equipment maintenance and repair.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to solve the technical problem that the sealing member that overcomes industrial equipment adopts among the prior art is poor to the sealed effect of transmission guide arm, often will take place the condition that working medium leaked after using a period, and the solid particle in the working medium of leaking simultaneously can accelerate the wearing and tearing inefficacy of sealing member and transmission guide arm, not only influences the efficiency of production to the problem of equipment maintenance and maintenance cost has greatly been increased.

In order to solve the technical problem, the utility model provides a differential pressure type reciprocating sliding sealing box which is arranged between a transmission guide rod of equipment and a mounting hole of a top cover of the equipment and comprises,

the sealing box comprises a sealing box body, wherein a through hole is formed in the sealing box body, the through hole is a step through hole and comprises a first step hole section and a second step hole section which are arranged at intervals along the axial direction of the through hole, a sealing liquid passage and an overflow passage are formed in the sealing box body, one end of the sealing liquid passage is communicated with the outside, the other end of the sealing liquid passage is communicated with the first step hole section, one end of the overflow passage is communicated with the outside, and the other end of the overflow passage is communicated with the second step hole section.

In an embodiment of the utility model, the sealing box main part is installed in the mounting hole of equipment top cap, the transmission guide arm passes the through-hole and with sealing box main part and equipment top cap form the sealed to the equipment inner chamber, wherein, form first annular space and second annular space between first step hole district section and second step hole district section and the transmission guide arm respectively, be provided with in the first annular space and lead and press seal assembly, lead and press seal assembly including leading clamping ring, first combination sealing member and second combination sealing member, lead clamping ring cover coaxial set up in the first annular space, first combination sealing member with second combination sealing member coaxial set up in first annular space and lie in the both sides that lead the clamping ring respectively.

In an embodiment of the present invention, the annular groove is disposed on the inner circumferential surface of the pressure guiding ring, the radial flow guiding small hole communicated with the annular groove is disposed on the outer circumferential surface of the pressure guiding ring, and the position of the annular groove corresponds to the output end of the sealing liquid passage.

In an embodiment of the present invention, the through hole further includes a third stepped hole section, the third stepped hole section is located on a side of the second stepped hole section facing away from the first stepped hole section, a third annular space is formed between the third stepped hole section and the transmission guide rod, and an antifouling seal assembly is provided in the third annular space.

In an embodiment of the present invention, the antifouling seal assembly includes a third combined seal member and an antifouling isolating ring coaxially disposed in the third stepped hole section, and an antifouling seal ring is disposed between a side surface of the antifouling isolating ring and a side wall of the third stepped hole section.

The utility model discloses an in one embodiment, the sealing liquid passageway is connected with sealing liquid input device, sealing liquid input device inputs high-pressure sealing liquid to the sealing liquid passageway, and the input pressure of high-pressure sealing liquid is greater than the operating pressure of working medium in the equipment inner chamber.

In one embodiment of the present invention, the high-pressure sealing liquid may be water.

In an embodiment of the present invention, a constant pressure overflow valve is disposed in the overflow path, and the overflow path is connected to a collecting device.

The utility model discloses an in one embodiment, first step hole section position is in the sealing box main part is close to the one end of equipment inner chamber, be provided with on the first step hole section and be used for carrying out confined first gland to it.

The utility model discloses an in one embodiment, third step hole section position is in the sealed box main part deviates from the one end of equipment inner chamber, be provided with on the third step hole section and be used for carrying out confined second gland to it.

Compared with the prior art, the technical scheme of the utility model have following advantage:

the utility model discloses a differential pressure formula reciprocating sliding seal box, including the seal box main part, be provided with sealing liquid passageway and overflow route respectively in the seal box main part, through letting in high-pressure sealing liquid to the sealing liquid passageway, and ensure that the actual operating pressure of the high-pressure sealing liquid of input is higher than the actual operating pressure of the working medium inside the equipment, make the inside of the interior high-pressure sealing liquid flow direction equipment of few part, the working medium inside the equipment can't leak out from the inside of equipment, reach sealed effect; meanwhile, a part of high-pressure sealing liquid flows to the outside of the device and is collected through the overflow path, so that the stable input process of the sealing liquid is ensured, the stable pressure is realized, and the sealing performance of the sealing box is ensured. The utility model discloses a sealed box can be used for the sealed of the reciprocating sliding push rod on the multiple inside technological equipment for having pressure's solid-liquid diphase fluid medium, can ensure that the inside working medium of equipment does not take place to leak to spare parts such as the push rod of assurance equipment can not take place wearing and tearing, corruption, pollution and inefficacy because of working medium's leakage, and the range of application is wide, and the reliability is high, and is with low costs, the machining precision and the processing degree of difficulty are little, long service life, low price and maintenance requirement are low, are suitable for the practicality.

Drawings

In order to make the content of the invention more clearly understood, the invention will now be described in further detail with reference to specific embodiments thereof, in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic view of the overall structure of a differential pressure type reciprocating sliding seal box according to a preferred embodiment of the present invention;

fig. 2 is a schematic structural view of a sealing box main body of the differential pressure type reciprocating sliding sealing box according to the preferred embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of the differential pressure type reciprocating sliding seal shown in FIG. 1;

FIG. 4 is an enlarged view of portion B of the differential pressure type reciprocating sliding seal shown in FIG. 1;

FIG. 5 is an enlarged view of a portion C of the differential pressure type reciprocating sliding seal box shown in FIG. 2;

fig. 6 is an enlarged view of a portion D of the differential pressure type reciprocating sliding seal box shown in fig. 2.

The specification reference numbers indicate: 1. a sealing box body; 11. a first stepped bore section; 12. a second stepped bore section; 13. a sealing liquid passage; 14. an overflow passage; 15. a third stepped bore section; 2. a pressure-conducting seal assembly; 21. a pressure guide ring; 211. an annular groove; 212. small radial flow guide holes; 22. a first composite seal; 23. a second composite seal; 24. an isolating ring; 3. an anti-fouling seal assembly; 31. a third composite seal; 32. an antifouling isolating ring; 33. an antifouling seal ring; 4. a first gland; 41. antifouling combined sealing; 5. a second gland; 51. and (5) dustproof combined sealing.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1 to 4, a differential pressure type reciprocating sliding sealing box of the present invention comprises,

the sealing box comprises a sealing box body 1, wherein a through hole is formed in the sealing box body 1, the through hole is a step through hole and comprises a first step hole section 11 and a second step hole section 12 which are arranged at intervals along the axial direction of the sealing box body, a sealing liquid passage 13 and an overflow passage 14 are formed in the sealing box body 1, one end of the sealing liquid passage 13 is communicated with the outside, the other end of the sealing liquid passage 13 is communicated with the first step hole section 11, one end of the overflow passage 14 is communicated with the outside, and the other end of the overflow passage is communicated with the second step hole section 12.

Specifically, in the using process, high-pressure sealing liquid is introduced into the sealing liquid passage 13, and the high-pressure sealing liquid is guided into the annular groove 211 of the pressure guiding ring 21 through the sealing liquid passage 13 and is guided to the first combined sealing element 22 and the second combined sealing element 23 through the radial small flow guiding holes 212 formed in the annular groove 211 and the gap between the inner wall of the pressure guiding ring 21 and the side surface of the transmission guide rod; a small amount of high-pressure sealing liquid flows into the equipment through the first combined sealing element 22, and because the input pressure of the high-pressure sealing liquid is greater than the working pressure of the working medium in the equipment, the working medium in the equipment cannot leak out of the equipment, so that the sealing effect is achieved.

It should be noted that, the actual operating pressure that will ensure the high-pressure sealing liquid of input is higher than the actual operating pressure of the inside working medium of equipment, just can ensure that the working medium in the equipment inner chamber can not leak outside equipment, even if like this, the solid-liquid diphasic liquid pressure working medium in the equipment inner chamber has characteristics such as solid abrasiveness, corrosivity and toxicity, nevertheless because the utility model discloses a seal structure can guarantee that the working medium can't run and leak to the sealed department of drive arm, consequently can not take place the accelerated wear failure of parts such as drive arm, can reduce the equipment maintenance and change the frequency of spare part, reduce the cost of production.

Meanwhile, it is conceivable that a part of the high-pressure sealing liquid will flow to the outside direction of the apparatus through the second combined sealing element 23, the part of the high-pressure sealing liquid will enter the second annular space through the tiny annular gap between the transmission guide rod and the sealing box main body 1, and most of the high-pressure sealing liquid entering the second annular space will flow to the outside of the sealing box main body 1 from the overflow passage 14 with constant overflow back pressure, and is collected through a special waste liquid collecting container or a waste liquid collecting pipeline system; only a very trace part of the high-pressure sealing liquid entering the second annular space can continuously leak to the outside of the equipment, but the part of the high-pressure sealing liquid can theoretically leak to the outside of the equipment but not be water, so that even if the high-pressure sealing liquid leaks in a trace amount, no environmental protection hazard can be caused, and the accelerated wear failure of an equipment shafting can not be caused. It is conceivable that only by appropriately setting the overflow back pressure of the high-pressure sealing liquid, a slight amount of sealing liquid leaking to the third composite seal may bring about a beneficial lubricating and cooling effect on the third composite seal.

Further, the sealing box main body 1 is installed in an installation hole of an equipment top cover, a transmission guide rod penetrates through the through hole and forms sealing for an equipment inner cavity together with the sealing box main body 1 and the equipment top cover, wherein a first annular space and a second annular space are respectively formed between the first stepped hole section 11 and the second stepped hole section 12 and the transmission guide rod, a pressure guide sealing assembly 2 is arranged in the first annular space, the pressure guide sealing assembly 2 comprises a pressure guide ring 21, a first combined sealing member 22 and a second combined sealing member 23, the pressure guide ring 21 is coaxially arranged in the first annular space, and the first combined sealing member 22 and the second combined sealing member 23 are coaxially arranged in the first annular space and are respectively located on two sides of the pressure guide ring 21. Specifically, the first combined sealing element 22 is located at one side close to the inner cavity of the device, the second combined sealing element 23 is located at one side away from the inner cavity of the device, and a spacer ring 24 is further arranged at one side of the second combined sealing element 23 away from the inner cavity of the device.

Furthermore, an annular groove 211 is formed on the inner circumferential surface of the pressure guiding ring 21, a radial small flow guiding hole 212 communicated with the annular groove 211 is formed on the outer circumferential surface of the pressure guiding ring 21, and the position of the annular groove 211 corresponds to the output end of the sealing liquid passage 13.

Further, the through hole further comprises a third stepped hole section 15, the third stepped hole section 15 is located on a side of the second stepped hole section 12 facing away from the first stepped hole section 11, a third annular space is formed between the third stepped hole section 15 and the transmission guide rod, and the antifouling seal assembly 3 is arranged in the third annular space. Specifically, the first stepped bore section 11 is located on the side of the sealing box body 1 close to the inner cavity of the apparatus, the third stepped bore section 15 is located on the side of the sealing box body 1 away from the inner cavity of the apparatus, and the second stepped bore section 12 is located between the first stepped bore section 11 and the third stepped bore section 15 (located at a position close to the middle of the sealing box body 1).

Further, the anti-fouling seal assembly 3 comprises a third combined seal 31 and an anti-fouling spacer ring 32 which are coaxially arranged in the third stepped hole section 15, and an anti-fouling seal ring 33 is arranged between the side surface of the anti-fouling spacer ring 32 and the side wall of the third stepped hole section 15.

Further, the sealing liquid passage 13 is connected to a sealing liquid input device, and the sealing liquid input device inputs high-pressure sealing liquid into the sealing liquid passage 13, and the input pressure of the high-pressure sealing liquid is greater than the working pressure of the working medium in the inner cavity of the equipment. It is conceivable that, since the input high-pressure sealing liquid has a higher liquid pressure than the solid-liquid two-phase liquid working medium inside the apparatus, the flow resistance loss and the liquid pressure of the working medium inside the apparatus flow into the inner cavity of the apparatus without fail, thereby ensuring that the working medium in the inner cavity of the apparatus does not leak.

Preferably, the end of the sealing liquid channel 13, which is communicated with the external space through the overflow channel 14, is provided with a connector, so that the sealing liquid channel can be conveniently connected with a sealing liquid input device and a waste liquid collecting device.

Further, the high pressure sealing fluid may be water. It is conceivable that, when the solid-liquid two-phase liquid working medium in the inner cavity of the apparatus is a medium containing water, a small amount of water (high-pressure sealing liquid) is allowed to enter the inner cavity of the apparatus, and the working medium in the inner cavity of the apparatus is not affected. It is also contemplated that the high pressure sealing fluid is not limited to water, but may be any liquid chemical compatible with the liquid medium within the device.

Further, a constant pressure relief valve is provided in the relief passage 14, and a collecting device is connected to the relief passage 14. Specifically, a constant-pressure overflow valve is arranged at the output end of the overflow passage 14 to ensure that the overflow passage 14 has a back pressure with a proper size, and the sealing efficiency of the antifouling sealing component 3 close to the outer side of the equipment is equivalently superposed on the sealing performance of the sealing element close to the inner part of the equipment to the maximum extent, so that the sealing performance of the sealing box is remarkably improved, all sealing elements can be lubricated and cooled, the rotating friction and the energy loss of the sealing elements are reduced, and the actual service life of each sealing element is remarkably prolonged.

Referring to fig. 5 and 6, further, a first stepped hole section 11 is located at one end of the sealing box body 1 close to the inner cavity of the device, and a first gland 4 for sealing the first stepped hole section 11 is arranged on the first stepped hole section. Specifically, the first stepped hole section 11 directly communicates with an inner cavity of the equipment, the first stepped hole section 11 is closed by arranging a first gland 4 at an end of the first stepped hole section 11 facing the inner cavity of the equipment, and the first stepped hole section 11 closed by the first gland 4 forms a first annular space. Wherein, be provided with on the first gland 4 with the through-hole coaxial setting of sealing box main part 1 for the first via hole that the transmission guide pole passes through, it is simultaneously conceivable that can set up annular first recess on the inner wall of the first via hole of first gland 4 to set up antifouling combination seal 41 in the first recess, can further improve the sealing performance of device.

Further, a third stepped hole section 15 is located at one end, away from the inner cavity of the device, of the sealing box body 1, and a second gland 5 for sealing the third stepped hole section 15 is arranged on the third stepped hole section 15. Specifically, the third stepped hole section 15 is directly communicated with the external space, the third stepped hole section 15 is sealed by arranging the second gland 5 on the third stepped hole section, and the antifouling seal assembly 3 is arranged in the sealed space formed by the second gland 5 and the third stepped hole section 15, so that the sealing performance of the device is further improved. A second through hole for the transmission guide rod to pass through is formed in the second gland 5, an annular second groove is formed in the inner wall of the second through hole, and a dustproof combined seal 51 is arranged in the second groove. It should be noted that annular gaps are left between the first gland 4 and the second gland 5 and between the first through hole and the second through hole, and the outer circles of the first gland 4 and the second gland 5 have radial positioning size matching with the inner walls of the first stepped hole section 11 and the third stepped hole section 15 respectively.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a reciprocating sliding seal box of differential pressure formula, installs between the mounting hole of the transmission guide arm of equipment and equipment top cap, its characterized in that: comprises the steps of (a) preparing a substrate,

the sealing box comprises a sealing box body, wherein a through hole is formed in the sealing box body, the through hole is a step through hole and comprises a first step hole section and a second step hole section which are arranged at intervals along the axial direction of the sealing box body, a sealing liquid passage and an overflow passage are formed in the sealing box body, one end of the sealing liquid passage is communicated with the outside, the other end of the sealing liquid passage is communicated with the first step hole section, one end of the overflow passage is communicated with the outside, and the other end of the overflow passage is communicated with the second step hole section.

2. A differential pressure type reciprocating sliding seal box according to claim 1, wherein: the sealing box main part is installed in the mounting hole of equipment top cap, the transmission guide arm passes the through-hole and with sealing box main part and equipment top cap form the sealed to the equipment inner chamber, wherein, form first annular space and second annular space between first step hole district section and second step hole district section and the transmission guide arm respectively, be provided with in the first annular space and lead and press seal assembly, it includes clamping ring, first combined seal spare and second combined seal spare to lead to press seal assembly, lead to press the ring coaxial set up in the first annular space, first combined seal spare with second combined seal spare coaxial set up in first annular space and lie in the both sides of leading the clamping ring respectively.

3. A differential pressure type reciprocating sliding seal box according to claim 2, wherein: the inner side circumferential surface of the pressure guide ring is provided with an annular groove, the outer side circumferential surface of the pressure guide ring is provided with a radial flow guide small hole communicated with the annular groove, and the position of the annular groove corresponds to the output end of the sealing liquid passage.

4. A differential pressure type reciprocating sliding seal box according to claim 1, wherein: the through hole further comprises a third stepped hole section, the third stepped hole section is located on one side, away from the first stepped hole section, of the second stepped hole section, a third annular space is formed between the third stepped hole section and the transmission guide rod, and an antifouling seal assembly is arranged in the third annular space.

5. The differential pressure type reciprocating sliding seal box according to claim 4, wherein: the antifouling seal assembly comprises a third combined seal and an antifouling isolating ring which are coaxially arranged in the third stepped hole section, and an antifouling sealing ring is arranged between the side face of the antifouling isolating ring and the side wall of the third stepped hole section.

6. A differential pressure type reciprocating sliding seal box according to claim 1, wherein: the sealing liquid channel is connected with a sealing liquid input device, the sealing liquid input device inputs high-pressure sealing liquid into the sealing liquid channel, and the input pressure of the high-pressure sealing liquid is greater than the working pressure of working media in the inner cavity of the equipment.

7. The differential pressure type reciprocating sliding seal gland according to claim 6, wherein: the high pressure sealing fluid may be water.

8. A differential pressure type reciprocating sliding seal box according to claim 1, wherein: a constant-pressure overflow valve is arranged in the overflow passage, and the overflow passage is connected with a collecting device.

9. A differential pressure type reciprocating sliding seal box according to claim 1, wherein: the first step hole section is located at one end, close to an equipment inner cavity, of the sealing box body, and a first gland used for sealing the first step hole section is arranged on the first step hole section.

10. The differential pressure type reciprocating sliding seal box according to claim 4, wherein: the third step hole section is located at one end, deviating from the inner cavity of the device, of the sealing box body, and a second gland used for sealing the third step hole section is arranged on the third step hole section.