A heating sandwich sealing structure of a radix astragali extract concentration tank
Patent Information
- Application Number
- CN202522026835.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-09-22
AI Technical Summary
加热夹层的密封性能直接影响加热效率和设备运行安全性，若密封失效，会导致加热介质泄漏，不仅降低加热效率，还可能引发安全事故
本实用新型，采用第一密封环、第二密封环及弹性缓冲层组成的多层密封结构，保证了加热夹层良好的密封性，具备优异的耐高温、耐腐蚀性，有效延长了密封结构的使用寿命，通过设置的第一密封环和第二密封环，解决了耐高温则弹性不足、弹性好则不耐腐蚀的问题，有利于大幅降低介质泄漏风险，然后通过在第一密封环和第二密封环之间夹设的弹性缓冲层，能够避免第一密封环和第二密封环在压紧力作用下过度变形、失去弹性，保证第一密封环和第二密封环的长期密封性能，避免因热应力导致的密封失效。
Smart Images
Figure CN224730827U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of Chinese medicinal material extraction equipment, specifically, it relates to a heating jacket sealing structure for an Astragalus extraction and concentration tank. Background Technology
[0002] Astragalus, a commonly used traditional Chinese medicine, typically extracts its active ingredients using a concentration tank. This tank usually heats the material inside by introducing steam or hot water through a heating jacket, thus achieving the extraction and concentration of the active ingredients. The sealing performance of the heating jacket directly affects the heating efficiency and the safety of the equipment operation. If the seal fails, it can lead to leakage of the heating medium, not only reducing heating efficiency but also potentially causing safety accidents. Currently, the heating jacket sealing structure of Astragalus extraction and concentration tanks mostly uses a single rubber sealing ring for sealing. Due to the high temperature inside the heating jacket during the extraction process and the potential corrosiveness of the medium, the single rubber sealing ring is prone to aging and deformation, resulting in a decline in sealing performance and the need for frequent replacement, which increases maintenance costs. At the same time, the compression method of traditional sealing structures is mostly a fixed connection, which cannot provide elastic compensation according to the aging degree of the sealing ring, inevitably shortening the service life of the sealing structure.
[0003] In view of the above, this utility model is hereby proposed. Utility Model Content
[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: A heating jacketed sealing structure for an Astragalus extract concentration tank includes a tank shell, an inner tank liner disposed inside the tank shell, a heating jacket disposed between the tank shell and the inner tank liner, a liquid outlet pipe disposed at the bottom of the inner tank liner, an installation hole provided at the bottom of the tank shell, and the liquid outlet pipe disposed inside the installation hole, a sealing element disposed on the outer wall of the liquid outlet pipe, the sealing element consisting of a first sealing ring, a second sealing ring and an elastic buffer layer, the first sealing ring being located at the outermost layer of the sealing element and tightly fitted to the inner wall of the installation hole, the second sealing ring being located at the inner layer of the sealing element and tightly fitted to the outer wall of the liquid outlet pipe, and the elastic buffer layer being sandwiched between the first sealing ring and the second sealing ring.
[0005] In a preferred embodiment of this utility model, the first sealing ring is made of fluororubber, the second sealing ring is made of silicone rubber, and the elastic buffer layer is a honeycomb TPU mesh layer.
[0006] In a preferred embodiment of this utility model, a support frame is fixedly provided at the bottom of the tank shell, and a steam pipe is provided on one side of the tank shell, which is connected to the heating jacket.
[0007] In a preferred embodiment of this utility model, the top of the tank shell is provided with a top cover, and the top cover is provided with a feeding port.
[0008] In a preferred embodiment of this utility model, an annular groove is provided at the top of the inner liner of the tank, and a sealing ring is fixedly provided at the bottom of the top cover. The sealing ring is tightly fitted with the inner wall of the annular groove, and the sealing ring has the same structure as the sealing element.
[0009] In a preferred embodiment of the present invention, a fixing plate is fixedly provided on the outer wall of the bottom end of the sealing element, and the fixing plate has symmetrically arranged through holes, and a fixing screw is provided inside the through holes.
[0010] In a preferred embodiment of this utility model, the bottom of the tank shell is fixedly connected with symmetrically arranged threaded sleeves, and the fixing screw is screwed onto the inner wall of the threaded sleeve.
[0011] Compared with the prior art, the present invention has the following advantages: This invention employs a multi-layer sealing structure consisting of a first sealing ring, a second sealing ring, and an elastic buffer layer. This ensures excellent sealing performance of the heated interlayer, exhibits superior high-temperature resistance and corrosion resistance, and effectively extends the service life of the sealing structure. The first and second sealing rings solve the problems of insufficient elasticity in high-temperature resistance and poor corrosion resistance in high-elasticity, significantly reducing the risk of media leakage. Furthermore, the elastic buffer layer sandwiched between the first and second sealing rings prevents excessive deformation and loss of elasticity under clamping force, ensuring the long-term sealing performance of the first and second sealing rings and avoiding sealing failure due to thermal stress.
[0012] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description
[0013] In the attached diagram: Figure 1 This is a schematic diagram of the main structure of the outer shell of the Astragalus extract concentration tank with heating jacket sealing structure according to the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the outer shell and top cover of the Astragalus extract concentration tank with heating jacket sealing structure according to this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the outer shell, top cover, and inner liner of the Astragalus extract concentration tank with heating jacket sealing structure according to this utility model; Figure 4 This is a cross-sectional view of the sealing element of the heating jacket sealing structure of the Astragalus extract concentration tank according to this utility model.
[0014] In the diagram: 1. Tank outer shell; 2. Support frame; 3. Steam pipe; 4. Top cover; 5. Feed port; 6. Liquid outlet pipe; 7. Tank inner liner; 8. Sealing components; 801. First sealing ring; 802. Second sealing ring; 803. Elastic buffer layer; 9. Fixing plate; 10. Fixing screw; 11. Threaded sleeve; 12. Annular groove; 13. Sealing ring; 14. Heating jacket. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.
[0016] like Figures 1 to 4 As shown A heating jacket sealing structure for an Astragalus extract concentration tank includes a tank outer shell 1, an inner tank liner 7 disposed inside the tank outer shell 1, a heating jacket 14 disposed between the tank outer shell 1 and the inner tank liner 7, a support frame 2 fixedly disposed at the bottom of the tank outer shell 1, a steam pipe 3 disposed on one side of the tank outer shell 1, the steam pipe 3 being connected to the heating jacket 14, and the heating medium (steam) being introduced into the heating jacket 14 through the steam pipe 3. A liquid outlet pipe 6 is disposed at the bottom of the inner tank liner 7, and an installation hole is provided at the bottom of the tank outer shell 1, with the liquid outlet pipe 6 positioned... Inside the mounting hole, a sealing element 8 is provided on the outer wall of the outlet pipe 6. The sealing element 8 consists of a first sealing ring 801, a second sealing ring 802, and an elastic buffer layer 803. The first sealing ring 801 is made of fluororubber, the second sealing ring 802 is made of silicone rubber, and the elastic buffer layer 803 is a honeycomb TPU mesh layer. The first sealing ring 801 is located on the outermost layer of the sealing element 8 and is tightly fitted to the inner wall of the mounting hole. The first sealing ring 801 is in direct contact with the high-temperature, corrosive medium in the heating jacket 14. The first sealing ring 801 utilizes the high temperature resistance and acid and alkali corrosion resistance of fluororubber to block media penetration, forming the first line of defense. The second sealing ring 802 is located in the inner layer of the sealing element 8 and fits tightly against the outer wall of the outlet pipe 6. The second sealing ring 802, with its excellent elasticity and deformation capacity, fills tiny gaps, forming a second sealing barrier to effectively block media penetration. The elastic buffer layer 803 is sandwiched between the first sealing ring 801 and the second sealing ring 802, which can prevent the first sealing ring 801 and the second sealing ring 802 from penetrating. 2. Under the action of clamping force, excessive deformation and loss of elasticity are prevented to ensure the long-term sealing performance of the first sealing ring 801 and the second sealing ring 802. The honeycomb holes can deform synchronously with the thermal expansion and contraction of the first sealing ring 801 and the second sealing ring 802 to adapt to the volume change of the heating jacket 14 during the heating (medium introduction) and cooling (shutdown) processes. This ensures that the first sealing ring 801 is always in close contact with the inner wall of the mounting hole of the liquid outlet pipe 6, and the second sealing ring 802 is always in close contact with the outer wall of the liquid outlet pipe 6, avoiding sealing failure caused by thermal stress.
[0017] In a specific embodiment, a top cover 4 is provided on the top of the outer shell 1 of the tank, and a feeding port 5 is provided on the top cover 4. An annular groove 12 is provided on the top of the inner liner 7 of the tank. A sealing ring 13 is fixedly provided at the bottom of the top cover 4. The sealing ring 13 is tightly fitted with the inner wall of the annular groove 12. The sealing ring 13 has the same structure as the sealing element 8. A fixing plate 9 is fixedly provided on the outer wall of the bottom end of the sealing element 8. A symmetrically arranged through hole is provided on the fixing plate 9, and a fixing screw 10 is provided inside the through hole. A symmetrically arranged threaded sleeve 11 is fixedly connected to the bottom of the outer shell 1 of the tank, and the fixing screw 10 is screwed onto the inner wall of the threaded sleeve 11.
[0018] The implementation principle of the heating jacket sealing structure of the Astragalus extract concentration tank in this embodiment is as follows: In practical use, the heating medium (steam) is introduced into the heating jacket 14 through the steam pipe 3. At this time, the first sealing ring 801 (fluororubber) of the sealing element 8 is tightly fitted to the mounting hole of the liquid outlet pipe 6, and the first sealing ring 801 is in direct contact with the high temperature and corrosive medium in the heating jacket 14. Utilizing the high temperature resistance and acid and alkali corrosion resistance of fluororubber, it can block the medium from penetrating, forming the first line of defense. At the same time, the second sealing ring 802 (silicone rubber) of the sealing element 8, with its excellent elasticity and deformation ability, is tightly fitted to the outer wall of the liquid outlet pipe 6, filling tiny gaps and forming the second sealing barrier, effectively blocking the medium from penetrating. The complementary materials of the first sealing ring 801 and the second sealing ring 802 solve the problem of insufficient elasticity for high temperature resistance and inadequate elasticity for good elasticity. The contradiction of corrosion resistance significantly reduces the risk of media leakage. Then, by using the elastic buffer layer 803 sandwiched between the first sealing ring 801 and the second sealing ring 802, it is possible to prevent the first sealing ring 801 and the second sealing ring 802 from being excessively deformed and losing elasticity under the action of clamping force, thus ensuring the long-term sealing performance of the first sealing ring 801 and the second sealing ring 802. The honeycomb holes can deform synchronously with the thermal expansion and contraction of the first sealing ring 801 and the second sealing ring 802, adapting to the volume change of the heating jacket 14 during the heating (medium introduction) and cooling (shutdown) processes, ensuring that the first sealing ring 801 is always tightly fitted to the inner wall of the mounting hole of the liquid outlet pipe 6, and the second sealing ring 802 is always tightly fitted to the outer wall of the liquid outlet pipe 6, avoiding sealing failure caused by thermal stress.
Claims
1. A heating jacketed sealing structure for an Astragalus extract concentration tank, comprising a tank shell (1), characterized in that, The inner side of the outer shell (1) of the tank is provided with a tank inner liner (7). A heating jacket (14) is provided between the outer shell (1) and the inner liner (7). A liquid outlet pipe (6) is provided at the bottom of the inner liner (7). An installation hole is provided at the bottom of the outer shell (1), and the liquid outlet pipe (6) is located inside the installation hole. A sealing element (8) is provided on the outer wall of the liquid outlet pipe (6). The sealing element (8) is composed of a first sealing ring (801), a second sealing ring (802), and an elastic buffer layer (803). The first sealing ring (801) is located on the outermost layer of the sealing element (8) and is tightly fitted to the inner wall of the installation hole. The second sealing ring (802) is located on the inner layer of the sealing element (8) and is tightly fitted to the outer wall of the liquid outlet pipe (6). The elastic buffer layer (803) is sandwiched between the first sealing ring (801) and the second sealing ring (802).
2. The heating jacket sealing structure of the Astragalus extract concentration tank according to claim 1, characterized in that, The first sealing ring (801) is made of fluororubber, the second sealing ring (802) is made of silicone rubber, and the elastic buffer layer (803) is a honeycomb TPU mesh layer.
3. The heating jacket sealing structure of the Astragalus extract concentration tank according to claim 1, characterized in that, A support frame (2) is fixedly installed at the bottom of the tank shell (1), and a steam pipe (3) is installed on one side of the tank shell (1). The steam pipe (3) is connected to the heating jacket (14).
4. The heating jacket sealing structure of the Astragalus extract concentration tank according to claim 1, characterized in that, The tank shell (1) is provided with a top cover (4) and a feeding port (5) is provided on the top cover (4).
5. The heating jacket sealing structure of the Astragalus extract concentration tank according to claim 4, characterized in that, The inner liner (7) of the tank has an annular groove (12) at the top, and the top cover (4) has a sealing ring (13) fixedly installed at the bottom. The sealing ring (13) is tightly fitted to the inner wall of the annular groove (12), and the sealing ring (13) has the same structure as the sealing element (8).
6. The heating jacket sealing structure of the Astragalus extract concentration tank according to claim 1, characterized in that, A fixing plate (9) is fixedly installed on the outer wall of the bottom end of the sealing element (8). The fixing plate (9) has symmetrically arranged through holes, and a fixing screw (10) is provided inside the through hole.
7. The heating jacket sealing structure of the Astragalus extract concentration tank according to claim 6, characterized in that, The bottom of the tank shell (1) is fixedly connected to a symmetrically arranged threaded sleeve (11), and the fixing screw (10) is screwed onto the inner wall of the threaded sleeve (11).