Mechanical seal structure with sampling and adding function

Abstract

The application discloses a mechanical sealing structure with sampling and adding functions and belongs to the mechanical sealing field. The sealing structure can sample and add medicines to the delivered liquid. The sealing structure comprises a first dynamic ring and a second dynamic ring. The opposite sides of the first dynamic ring and the second dynamic ring are respectively provided with spring clamping bases. The spring clamping bases are jointly clamped with first springs. The outer side surfaces of the first dynamic ring are uniformly distributed with limiting bolts. The right side of the second dynamic ring is rotationally abutted with a static ring. The outer side of the static ring is sleeved with a second O-shaped sealing ring. The static ring is installed in a shell. The right side surface of a transmission shaft is inwardly embedded with a cylindrical blind hole. The blind hole is extended to the left and is respectively provided with through holes upwards and downwards. A circular tube is rotationally inserted into the right end of the blind hole and is frictionally matched with the inner surface of the blind hole. The right end of the circular tube is closed. The left side of the right end of the circular tube is connected with a sampling pipe downwards and is connected with an adding pipe upwards. The sealing structure is simple in operation, convenient to use and suitable for the delivery of various liquids.

Description

Technical Field

[0001] This invention relates to the field of mechanical seals, specifically to a mechanical seal structure with sampling and adding functions. Background Technology

[0002] With the continuous advancement of technology and the increasing level of automation, my country's machinery industry has experienced rapid development, leading to the rapid growth of the mechanical seal industry. One existing mechanical seal structure, such as... Figure 2 As shown, it includes a first rotating ring 2 and a second rotating ring 4 sleeved on the drive shaft 1. The first rotating ring 2 and the second rotating ring 4 are respectively fixed on opposite sides with spring holders 20. A spring 3 is jointly held on the spring holders 20. The outer side of the first rotating ring 2 is evenly distributed with limiting bolts 21 that cooperate with the drive shaft 1. The inner side of the second rotating ring 4 is circumferentially embedded with an annular groove 40. The annular groove 40 is embedded with a first O-ring seal 401. The right side of the second rotating ring 4 rotates and abuts against the stationary ring 5. The outer side of the stationary ring 5 is sleeved with a second O-ring seal 51.

[0003] The mechanical seal structure described above provides a good sealing effect. However, in practical applications, it is sometimes necessary to sample the transported liquid or add chemicals. If the sampling and chemical addition structure can be combined with the mechanical seal structure, it will greatly improve the convenience for workers and expand the application range of the mechanical seal structure. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a mechanical seal structure with sampling and addition functions. This seal structure can sample the transported liquid and add reagents, improving operational convenience and expanding the applicability of the mechanical seal structure.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mechanical seal structure with sampling and addition functions, comprising a first rotating ring and a second rotating ring sleeved on a drive shaft, wherein spring holders are respectively fixed on opposite sides of the first rotating ring and the second rotating ring, and a first spring is commonly held on the spring holders; limiting bolts that cooperate with the drive shaft are evenly distributed circumferentially on the outer side of the first rotating ring; an annular groove is embedded circumferentially on the inner side of the second rotating ring, and a first O-ring is embedded in the annular groove; the right side of the second rotating ring rotates and abuts against a stationary ring, and a second O-ring is sleeved on the outer side of the stationary ring; the stationary ring is installed in the housing on the right side. The feature is that: a cylindrical blind hole is embedded inward at the center of the right side of the drive shaft; the blind hole extends to the left to the center of the first spring and has through holes at the top and bottom respectively; a round tube is rotatably inserted into the right end of the blind hole; the left end of the round tube is open and its outer surface is in frictional fit with the inner surface of the blind hole; a sealing element that fits with the round tube is embedded at the center of the housing; the right end of the round tube is closed; a sampling tube is connected downward to the left side of the right end of the round tube; a first ball valve is provided on the sampling tube; a first connector is provided at the lower end of the sampling tube; an adding tube is connected upward to the left side of the right end of the round tube; a second ball valve is provided on the adding tube; a second connector is provided at the upper end of the adding tube.

[0006] Preferably, the through hole is inclined, with its outer end opening on the outer surface of the drive shaft and its inner end communicating with the blind hole at an obtuse angle.

[0007] Preferably, an auxiliary sealing element is fitted onto the round tube on the right side of the housing. The auxiliary sealing element includes a square fixing block. Each of the four corners of the fixing block has a first transverse through hole, through which a bolt is inserted. The housing to the left of the bolt has a screw hole that mates with the bolt. A second through hole that mates with the round tube is embedded in the center of the fixing block. An arc-shaped groove is embedded on the inner side of each of the two ends of the second through hole, and a third O-ring seal is inserted in the arc-shaped groove.

[0008] Preferably, a circular groove is embedded in the fixing block on the outer side of the left port of the second perforation, and a fourth O-ring seal is inserted in the circular groove.

[0009] Preferably, the circular tube is further provided with a pulling and cleaning structure. The right end of the circular tube is open and the opening is sealed with a threaded end cap. A first fixing ear is provided at the center of the inner side of the end cap. The first fixing ear is fixedly connected to the right end of the first steel wire. The first steel wire extends to the left to the inner port of the upper and lower through holes and is fixedly connected to the inner end of the second steel wire. The second steel wire extends outward along the through holes to the outer side of the outer port and is fixedly connected to the second fixing ear on the inner end face of the baffle. A second spring is provided between the baffle and the drive shaft.

[0010] Preferably, the area of ​​the baffle is larger than the area of ​​the opening on the outside of the through hole.

[0011] Preferably, the second steel wire side inside the baffle is also provided with support rods at intervals.

[0012] Preferably, the outer ends of the support rods are pointed.

[0013] Compared with the prior art, the present invention provides a mechanical seal structure with sampling and addition functions, which has the following beneficial effects:

[0014] 1. This invention features through holes extending to the left from a blind hole, reaching the center of the first spring, and extending upwards and downwards respectively. A circular tube is rotatably inserted into the right end of the blind hole, with its outer surface in frictional engagement with the inner surface of the blind hole. A sealing element that mates with the circular tube is embedded in the center of the housing. The right end of the circular tube is closed, and a sampling tube is connected downwards to the left side of the right end of the circular tube. The sampling tube is equipped with a first ball valve, and a first connector is located at its lower end. An addition tube is connected upwards to the left side of the right end of the circular tube, and a second ball valve is equipped with the addition tube. A second connector is located at the upper end of the addition tube. In use, the through holes, blind holes, and circular tube allow communication between the inside and outside of the sealed structure. The first connector can be used to connect to a syringe or a negative pressure tube. Opening the first ball valve allows for sampling of the liquid inside the sealed structure. Closing the first ball valve and opening the second ball valve, along with connecting the syringe to the second connector via the injection tube, allows for the addition of liquid into the sealed structure through the addition tube. This improves operational convenience and expands the scope of application.

[0015] 2. The present invention features an inclined through-hole with its outer end opening onto the outer surface of the drive shaft and its inner end communicating with a blind hole at an obtuse angle. In use, the inclined design facilitates the subsequent pulling and cleaning of the through-hole. If the liquid blocks the opening of the through-hole, the through-hole can be cleaned by repeatedly operating the pulling and cleaning structure, which facilitates the smooth sampling and addition of liquid.

[0016] 3. The present invention provides an auxiliary sealing element by fitting an auxiliary sealing element on the round tube on the right side of the housing. The auxiliary sealing element can provide an auxiliary sealing effect on the round tube on the right side of the housing to prevent liquid from flowing out.

[0017] 4. In this invention, a circular groove is embedded in the fixing block on the outer side of the left port of the second perforation. A fourth O-ring is inserted in the circular groove. The fourth O-ring can further seal between the fixing block and the shell to prevent liquid from flowing out.

[0018] 5. The present invention also includes a traction cleaning structure in the round tube. When impurities in the liquid block the outer edge of the through hole, the cap on the right end of the round tube can be opened and the first steel wire can be pulled back and forth. The first steel wire pulls the second steel wire, and the side support can clean the side of the through hole. The second spring can play a resetting role.

[0019] 6. In this invention, the outer ends of the support rods are pointed, and the pointed structure facilitates the cleaning of dirt on the inner surface of the through hole during use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 This is a schematic diagram of an existing mechanical seal structure;

[0022] Figure 3 for Figure 1 A schematic diagram of the structure after adding auxiliary seals;

[0023] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0024] Figure 5 A schematic diagram of the right-side structure for the mating of the auxiliary seal with the housing;

[0025] Figure 6 for Figure 3 A schematic diagram of the structure after adding the traction cleaning structure;

[0026] Figure 7 for Figure 6 A magnified structural diagram at point B in the middle. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0028] like Figure 1 , Figure 2As shown, a mechanical seal structure with sampling and addition functions includes a first rotating ring 2 and a second rotating ring 4 sleeved on a drive shaft 1. Spring holders 20 are fixed on opposite sides of the first rotating ring 2 and the second rotating ring 4, and a first spring 3 is clamped on the spring holders 20. Limiting bolts 21 that cooperate with the drive shaft 1 are evenly distributed circumferentially on the outer side of the first rotating ring 2. The second moving ring 4 has an annular groove 40 embedded in its inner circumferential direction. The annular groove 40 contains a first O-ring seal 401. The right side of the second moving ring 4 rotates and abuts against the stationary ring 5. The stationary ring 5 is fitted with a second O-ring seal 51 on its outer side. The stationary ring 5 is installed in the housing 6 on the right side. A cylindrical blind hole 11 is embedded inward at the center of the right side of the drive shaft 1. The blind hole 11 extends to the left to the center of the first spring 3 and has through holes 12 at the top and bottom respectively. A round tube 7 is rotatably inserted into the right end of the blind hole 11. The left end of the round tube 7 is open, and its outer surface is in frictional fit with the inner surface of the blind hole 11. A sealing element that fits with the round tube 7 is embedded at the center of the housing 6. The right end of the round tube 7 is closed. The left side of the right end of the round tube 7 is connected downward to the sampling tube 8. The sampling tube 8 is equipped with a first ball valve 81. The lower end of the sampling tube 8 is equipped with a first connector 82. The left side of the right end of the round tube 7 is connected upward to the addition tube 9. The addition tube 9 is equipped with a second ball valve 91. The upper end of the addition tube 9 is equipped with a second connector 91. The through hole 12 is inclined, with its outer end opening on the outer surface of the drive shaft 1, and its inner end communicating with the blind hole 11 at an obtuse angle. The obtuse angle, compared to right angles and acute angles, facilitates the subsequent pulling and cleaning of the through hole 12. Example

[0029] like Figure 3 , Figure 4 , Figure 5 As shown, an auxiliary sealing element is fitted onto the round tube 7 on the right side of the housing 6. The auxiliary sealing element includes a square fixing block 10. The four corners of the fixing block 10 are respectively provided with horizontal first through holes 101. Bolts 102 are respectively inserted into the first through holes 101. The housing 6 on the left side of the bolts 102 is provided with screw holes 13 that mate with the bolts 102. Figure 4 The fixing block 10 has a second through hole (not separately marked) at its center that mates with the round tube 7. An arc-shaped groove 105 is embedded on the inner side of each of the two ends of the second through hole, and a third O-ring 106 is fitted into the arc-shaped groove 105, providing a seal between the round tube 7 and the two ends of the second through hole. A circular groove 103 is embedded on the fixing block 10 outside the left end of the second through hole, and a fourth O-ring 104 is fitted into the circular groove 103. This further enhances the seal between the fixing block 10 and the housing 6. Example

[0030] like Figure 6 , Figure 7As shown, the circular tube 7 is also provided with a pulling and cleaning structure. The right end of the circular tube 7 is open and the opening is sealed with a threaded end cap 71. The center of the inner side of the end cap 71 is provided with a first fixing ear (not shown). The first fixing ear is fixedly connected to the right end of the first steel wire 72. The first steel wire 72 extends to the left to the inner port of the upper and lower through holes 12 and is fixedly connected to the inner end of the second steel wire 73 respectively. Figure 6 , Figure 7 The second steel wire 73 extends outward along the through hole to the outer side of the outer port and is fixedly connected to the second fixing lug 741 on the inner end face of the baffle 74. A spring 75 is provided between the baffle 74 and the drive shaft 1. The area of ​​the baffle 74 is larger than the area of ​​the outer opening of the through hole 12 (to prevent the baffle 74 from slipping into the through hole 12). Support rods 731 are also fixedly provided at intervals on the side of the second steel wire 73 inside the baffle 74. The outer ends of the support rods 731 are pointed. When impurities in the liquid block the outer edge of the through hole, the end cap 71 at the right end of the round tube 7 can be opened (at this time, the first ball valve 81 and the second ball valve 91 are closed), and then the first steel wire 72 and the second steel wire 73 can be pulled back and forth through the end cap 71. The support rods 731 can be used to clean the side of the through hole 12. The second spring 75 cooperates with the baffle 74 to reset the steel wire.

[0031] All components used in this invention are general standard parts or parts known to those skilled in the art, and their structures and principles are well known to those skilled in the art.

[0032] 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 process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical seal structure with sampling and addition functions, comprising a first rotating ring and a second rotating ring sleeved on a drive shaft, wherein spring holders are respectively fixed on opposite sides of the first rotating ring and the second rotating ring, and a first spring is commonly held on the spring holders; limiting bolts cooperating with the drive shaft are evenly distributed circumferentially on the outer side of the first rotating ring; an annular groove is embedded circumferentially on the inner side of the second rotating ring, and a first O-ring is embedded in the annular groove; the right side of the second rotating ring rotates and abuts against a stationary ring, and a second O-ring is sleeved on the outer side of the stationary ring; the stationary ring is installed in the housing on the right side, characterized in that: A cylindrical blind hole is embedded inward at the center of the right side of the drive shaft. The blind hole extends to the left to the center of the first spring and has through holes at the top and bottom. A round tube is rotatably inserted into the right end of the blind hole. The left end of the round tube is open and its outer surface is in frictional fit with the inner surface of the blind hole. A sealing element that fits with the round tube is embedded in the center of the housing. The right end of the round tube is closed. A sampling tube is connected downward to the left side of the right end of the round tube. A first ball valve is provided on the sampling tube. A first connector is provided at the lower end of the sampling tube. An addition tube is connected upward to the left side of the right end of the round tube. A second ball valve is provided on the addition tube. A second connector is provided at the upper end of the addition tube.

2. The mechanical seal structure with sampling and adding functions according to claim 1, characterized in that: The through hole is inclined, with its outer end opening on the outer surface of the drive shaft and its inner end communicating with the blind hole at an obtuse angle.

3. The mechanical seal structure with sampling and adding functions according to claim 1, characterized in that: An auxiliary sealing element is fitted onto the round tube on the right side of the housing. The auxiliary sealing element includes a square fixing block. Each of the four corners of the fixing block has a first horizontal through hole, through which a bolt is inserted. The housing to the left of the bolt has a screw hole that mates with the bolt. The center of the fixing block has a second through hole that mates with the round tube. At the two ends of the second through hole, an arc-shaped groove is embedded on the inner side, and a third O-ring seal is inserted in the arc-shaped groove.

4. A mechanical seal structure with sampling and adding functions according to claim 3, characterized in that: A circular groove is embedded in the fixing block on the outer side of the left port of the second perforation, and a fourth O-ring seal is inserted in the circular groove.

5. A mechanical seal structure with sampling and adding functions according to claim 1, characterized in that: The circular tube is also provided with a pulling and cleaning structure. The right end of the circular tube is open and the opening is sealed with a threaded end cap. A first fixing ear is provided at the center of the inner side of the end cap. The first fixing ear is fixedly connected to the right end of the first steel wire. The first steel wire extends to the left to the inner port of the upper and lower through holes and is fixedly connected to the inner end of the second steel wire. The second steel wire extends outward along the through holes to the outer side of the outer port and is fixedly connected to the second fixing ear on the inner end face of the baffle. A second spring is provided between the baffle and the drive shaft.

6. A mechanical seal structure with sampling and adding functions according to claim 5, characterized in that: The area of ​​the baffle is larger than the area of ​​the opening on the outside of the through hole.

7. A mechanical seal structure with sampling and adding functions according to claim 5, characterized in that: The second steel wire side inside the baffle is also fixedly provided with support rods at intervals.

8. A mechanical seal structure with sampling and adding functions according to claim 7, characterized in that: The outer ends of the support rods are pointed.

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