Sealing structure of metering pump and metering pump

Abstract

The utility model provides a metering pump sealing structure and a metering pump, the metering pump sealing structure comprises a pump shaft and a packing gland, the packing gland is sleeved on the pump shaft, and a first sealing ring is arranged between the packing gland and the pump shaft. Compared with packing sealing in the prior art, the sealing structure of the metering pump adopts a sealing mode that the packing gland and the pump shaft are sealed by the first sealing ring, so that the sealing effect of the metering pump can be effectively improved, the service life of the metering pump is prolonged, the probability of glue leakage can be reduced, and the service life of the metering pump is prolonged. And the production stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of metering pump, especially relates to a sealing structure of metering pump and metering pump. BACKGROUND

[0002] At present, the sealing form of the existing metering pump is the traditional packing seal, and this kind of sealing form generally has good sealing effect in the initial stage of use, but with the passage of time, the internal sealing material can cause the leakage of the packing due to aging, wear and tear and other reasons, and once leakage occurs, even if the pre-tightening force of the packing is increased again, good sealing effect cannot be achieved. Therefore, the change of the sealing has irreversibility. At the same time, after the sealing fails, the shaft of the metering pump will be worn, thereby causing damage to the pump.

[0003] Moreover, the leaked glue solution will continuously age, and the content of metal ions in the glue solution continuously increases after long-time contact with the metal surface, forming high-iron-content dead glue which is extremely harmful to production, and the dead glue can greatly reduce the initial exothermic temperature of the production glue solution and cause the thermal runaway explosion of the production glue solution, seriously endangering the production safety.

[0004] Therefore, how to overcome the above technical defects is a problem to be solved by the person skilled in the art. UTILITY MODEL CONTENT

[0005] Therefore, the purpose of the utility model is to provide a sealing structure of metering pump, which can effectively improve the sealing effect of the metering pump, prolong the service life of the metering pump and improve the production stability.

[0006] Another purpose of the utility model is to provide a metering pump.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] A sealing structure of metering pump comprises a pump shaft and a packing gland, the packing gland is sleeved on the pump shaft, and a first sealing ring is further arranged between the packing gland and the pump shaft.

[0009] Optionally, the packing gland comprises a packing gland main body part and a packing gland edge part, the packing gland edge part is arranged at the top end face of the main body, and the first sealing ring is arranged between the pump shaft and the inner side wall of the packing gland main body part.

[0010] Optionally, the first sealing ring is at least two.

[0011] Optionally, the inner side wall of the packing gland main body part is provided with a first groove for mounting the first sealing ring, and / or the sidewall of the pump shaft is provided with a second groove for mounting the first sealing ring.

[0012] Optionally, a filler gland is sleeved on the outer sidewall of the filler gland main body, and a second sealing ring is arranged between the filler gland and the outer sidewall of the filler gland main body.

[0013] Optionally, the second sealing ring is at least two.

[0014] Optionally, the outer sidewall of the filler gland main body is provided with a third groove for mounting the second sealing ring, and / or the sidewall of the filler gland is provided with a fourth groove for mounting the second sealing ring.

[0015] Optionally, the lower end surface of the filler gland is flush with the lower end surface of the pump shaft, and the lower end surface of the filler gland main body is higher than the filler gland, so that there is a gap between the filler gland, the pump shaft and the filler gland main body.

[0016] The gap is further provided with a sealing assembly.

[0017] Optionally, the sealing assembly comprises a trapezoidal base and a trapezoidal sealing ring sleeved on the trapezoidal base in sequence, and the filler gland can press the trapezoidal sealing ring tightly on the trapezoidal base during pressing.

[0018] A metering pump comprising the sealing structure of the metering pump according to any one of the preceding embodiments.

[0019] As can be seen from the above technical solutions, compared with the filler seal of the prior art, the sealing structure of the metering pump disclosed in the embodiments of the present application adopts a sealing mode of sealing the filler gland and the pump shaft by the first sealing ring, which can not only effectively improve the sealing effect of the metering pump and prolong the service life of the metering pump, but also reduce the probability of glue leakage and improve the stability of production. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0021] Fig. 1 A structural schematic view of the sealing structure of the metering pump disclosed in the embodiments of the present application;

[0022] Fig. 2 A cooperation structural schematic view of the filler gland and the pump shaft disclosed in the embodiments of the present application;

[0023] Fig. 3The matching structure diagram of the sealing assembly is disclosed in the embodiments of the present utility model.

[0024] Mark explanation:

[0025] 100, pump shaft; 200, packing gland; 201, packing gland main body part; 202, packing gland edge part; 300, packing box; 400, first sealing ring; 500, second sealing ring; 600, sealing assembly; 601, trapezoidal base; 602, trapezoidal sealing ring. Specific implementation

[0026] Therefore, the core of the present utility model is to provide a sealing structure of a metering pump, which can effectively improve the sealing effect of the metering pump, prolong the service life of the metering pump, and improve the production stability.

[0027] Another purpose of the present utility model is to provide a metering pump.

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present utility model. Please refer to Figs. 1 to 3 .

[0029] Please refer to Fig. 1 The sealing structure of the metering pump disclosed in the embodiments of the present utility model comprises a pump shaft 100 and a packing gland 200, and the packing gland 200 is sleeved on the pump shaft 100. The first sealing ring 400 is arranged between the packing gland 200 and the pump shaft 100.

[0030] Compared with the packing seal of the prior art, the sealing structure of the metering pump disclosed in the embodiments of the present utility model adopts the first sealing ring 400 to seal the packing gland 200 and the pump shaft 100. The sealing structure can effectively improve the sealing effect of the metering pump, prolong the service life of the metering pump, reduce the probability of glue leakage, and improve the production stability.

[0031] As a further embodiment, please refer to Fig. 2 The packing gland 200 disclosed in the embodiments of the present utility model comprises a packing gland main body part 201 and a packing gland edge part 202. The packing gland edge part 202 is arranged at the top end surface of the packing gland main body part 201. The first sealing ring 400 is arranged between the inner side wall of the pump shaft 100 and the packing gland main body part 201.

[0032] The number of the first sealing ring 400 is not specifically set in the embodiment of the utility model, and the number meeting the use requirements of the utility model is within the protection scope of the utility model.

[0033] The first sealing ring 400 can be one, two or multiple, and a person skilled in the art can select according to actual needs.

[0034] It should be noted that the inner side wall of the packing gland main body part 201 is provided with the first groove for mounting the first sealing ring 400, and / or the side wall of the pump shaft 100 is provided with the second groove for mounting the first sealing ring 400.

[0035] That is to say, the first groove can be arranged only on the inner side wall of the packing gland main body part 201, and the first sealing ring 400 is mounted in the first groove, and at this time, the groove depth of the first groove matches the wall thickness of the first sealing ring 400; or the second groove can be arranged only on the side wall of the pump shaft 100, and the first sealing ring 400 is mounted in the second groove, and at this time, the groove depth of the second groove matches the wall thickness of the first sealing ring 400.

[0036] Of course, the first groove can be arranged on the inner side wall of the packing gland main body part 201, and the second groove can be arranged on the side wall of the pump shaft 100, and the sum of the groove depths of the first groove and the second groove matches the wall thickness of the second sealing ring 500.

[0037] As a further embodiment, the sealing structure of the metering pump disclosed in the embodiment of the utility model further comprises a packing box 300, the packing box 300 is sleeved on the outer side wall of the packing gland main body part 201, and the second sealing ring 500 is further arranged between the packing box 300 and the outer side wall of the packing gland main body part 201. In this way, the sealing effect of the metering pump can be further improved, the service life of the metering pump can be prolonged, the probability of glue leakage can be reduced, and the stability of production can be improved.

[0038] The packing gland edge part 202 and the packing box 300 have a gap therebetween, bolt holes are respectively arranged on the packing gland edge part 202 and the packing box 300, and the fastening connection of the packing gland 200 and the packing box 300 is realized through bolts.

[0039] The number of the second sealing ring 500 is not specifically set in the embodiment of the utility model, and the number meeting the use requirements of the utility model is within the protection scope of the utility model.

[0040] The second sealing ring 500 can be one, two or multiple, and a person skilled in the art can select according to actual needs.

[0041] It should be noted that the outer side wall of the filler gland main body part 201 is provided with a third groove for mounting the second sealing ring 500, and / or the side wall of the stuffing box 300 is provided with a fourth groove for mounting the second sealing ring 500.

[0042] That is, the third groove can be arranged only on the outer side wall of the filler gland main body part 201, and the second sealing ring 500 is mounted in the third groove, and at this time, the groove depth of the second sealing ring 500 matches the wall thickness of the third groove; or the fourth groove can be arranged only on the side wall of the stuffing box 300, and the second sealing ring 500 is mounted in the fourth groove.

[0043] Of course, the third groove can also be arranged on the outer side wall of the filler gland main body part 201, and the fourth groove can be arranged on the side wall of the stuffing box 300, and at this time, the sum of the groove depths of the third groove and the fourth groove matches the wall thickness of the second sealing ring 500.

[0044] It should be explained that the inner side wall of the filler gland main body part 201 is the side wall close to the pump shaft 100, and the outer side wall is the side wall close to the stuffing box 300.

[0045] As a further embodiment, the lower end surface of the stuffing box 300 is flush with the lower end surface of the pump shaft 100, and the lower end surface of the filler gland main body part 201 is higher than the stuffing box 300, so that there is a gap between the stuffing box 300, the pump shaft 100 and the filler gland main body part 201. The sealing assembly 600 is also arranged in the gap.

[0046] The specific structure of the sealing assembly 600 is not limited in the embodiment of the utility model, and any structure meeting the use requirements of the utility model is within the protection scope of the utility model.

[0047] As one of the embodiments, please refer to Fig. 3 The sealing assembly 600 disclosed in the embodiment of the utility model comprises a trapezoidal base 601 and a trapezoidal sealing ring 602 which is sequentially sleeved on the trapezoidal base 601, and the filler gland 200 can press the trapezoidal sealing ring 602 tightly on the trapezoidal base 601 in the process of pressing down.

[0048] When the sealing assembly 600 is installed in the gap, a triangular gap will appear in the gap, and at this time, the filler gland 200 is pressed down, and the trapezoidal sealing ring 602 is compressed to fill each gap. In this way, the sealing between the pump shaft 100, the stuffing box 300 and the filler gland 200 is realized, thereby further improving the sealing effect of the metering pump, prolonging the service life of the metering pump, reducing the probability of glue leakage, and improving the stability of production.

[0049] The utility model discloses an embodiment further discloses a metering pump, including the sealing structure of metering pump of any one embodiment disclosed above.

[0050] Since the metering pump adopts the sealing structure of the metering pump disclosed in the above embodiment, the metering pump has the technical advantages of the sealing structure of the metering pump disclosed in the embodiment of the utility model, and the embodiment of the utility model will not be described one by one.

[0051] Finally, it also needs to be explained that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0052] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between various embodiments can be referred to each other.

[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A seal structure for a metering pump, characterized by, The sealing structure comprises a pump shaft and a packing gland, the packing gland is sleeved on the pump shaft, and a first sealing ring is arranged between the packing gland and the pump shaft.

2. The seal structure of a metering pump according to claim 1, characterized in that, The packing gland comprises a packing gland body and a packing gland edge, the packing gland edge is arranged on the top end surface of the body, and the first sealing ring is arranged between the pump shaft and the inner side wall of the packing gland body.

3. The seal structure of a metering pump according to claim 1, characterized in that, The first sealing ring is at least two.

4. The seal structure of a metering pump according to claim 2, characterized in that, The inner side wall of the packing gland body is provided with a first groove for mounting the first sealing ring, and / or the side wall of the pump shaft is provided with a second groove for mounting the first sealing ring.

5. The seal arrangement for a metering pump of claim 2, wherein, The sealing structure further comprises a packing box, the packing box is sleeved on the outer side wall of the packing gland body, and a second sealing ring is arranged between the packing box and the outer side wall of the packing gland body.

6. The seal arrangement of a metering pump according to claim 5, characterized in that The second sealing ring is at least two.

7. The seal arrangement for a metering pump of claim 5, wherein, The outer side wall of the packing gland body is provided with a third groove for mounting the second sealing ring, and / or the side wall of the packing box is provided with a fourth groove for mounting the second sealing ring.

8. The seal arrangement for a metering pump of claim 5, wherein, The lower end surface of the packing box is flush with the lower end surface of the pump shaft, and the lower end surface of the packing gland body is higher than the packing box, so that there is a gap between the packing box, the pump shaft and the packing gland body. The gap is further provided with a sealing assembly.

9. The seal arrangement of a metering pump according to claim 8, characterized in that The sealing assembly comprises a trapezoidal base and a trapezoidal sealing ring sleeved on the trapezoidal base in sequence, and the packing gland can press the trapezoidal sealing ring tightly on the trapezoidal base during pressing.

10. A metering pump characterized by The sealing structure comprises a metering pump as claimed in any one of claims 1-9.

Images