A glass-lined circular flat plate three-hole condenser

Abstract

This invention relates to the field of condenser technology and discloses a glass-lined circular flat plate three-hole plate condenser, comprising: a porcelain-lined condenser, wherein multiple staggered material flow channels and cooling water flow channels are arranged inside the porcelain-lined condenser. Each cooling water flow channel is provided with multiple internal connecting pipes. The multiple material flow channels at different heights are interconnected through the multiple internal connecting pipes. As the cooling water and high-temperature materials continuously exchange heat, the cooling water will heat up and precipitate impurities in the water. Subsequently, the heated cooling water containing impurities will enter the input pipe through the external connecting pipe, and then flow through a three-way valve to the filter cylinder. The filter screen in the middle of the filter cylinder can intercept the impurities precipitated in the cooling water, preventing the impurities from returning to the cooling water flow channels for continued circulation. This helps maintain the cleanliness of the cooling water, avoids the accumulation of impurities in the heat exchange equipment, thereby reducing problems such as scaling and corrosion, and extending the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of condenser technology, and specifically to a glass-lined circular flat plate three-hole condenser. Background Technology

[0002] The glass-lined plate condenser is a high-efficiency and corrosion-resistant heat exchange device. Its working principle is based on the principle of heat exchange. High-temperature materials and cooling water are introduced into two carefully designed staggered cavities inside the condenser. When these two meet at different parts of the condenser, heat exchange occurs between them: the high-temperature materials release heat, which is absorbed by the cooling water, thereby gradually reducing the temperature of the high-temperature materials to the required condensation temperature.

[0003] To ensure the purity of cooling water and improve heat exchange efficiency, the cooling water is usually filtered before entering the condenser to remove suspended solids, particulate matter and other impurities from the water, preventing them from depositing in the jacket cavity and affecting the heat exchange effect.

[0004] However, despite filtration measures, cooling water still contains various dissolved ions, such as calcium and magnesium ions. As the temperature of the cooling water increases during heat absorption, the solubility of these ions changes, causing some ions to precipitate from the water, forming so-called "scale" or "impurities." These precipitated impurities gradually deposit in the jacket cavity. On the one hand, the deposited impurities alter the flow surface within the jacket cavity, making it uneven and reducing the effective heat exchange area, thus lowering the heat exchange efficiency. On the other hand, the deposited impurities also increase the flow resistance of the cooling water, increasing the pressure loss of the condenser and affecting its overall performance and operating efficiency. Based on this, the present invention aims to provide a glass-lined circular flat plate three-hole plate condenser that avoids the deposition of impurities precipitated from the cooling water in the jacket cavity during heat exchange. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a glass-lined circular flat plate three-hole plate condenser to solve the technical problems in the prior art.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A glass-lined circular flat plate three-hole condenser, comprising:

[0008] The enamel-lined condenser has multiple staggered material flow channels and cooling water flow channels inside. Each cooling water flow channel has multiple internal connecting pipes. The multiple material flow channels at different heights are interconnected through the multiple internal connecting pipes. The multiple cooling water flow channels at different heights are interconnected through the multiple external connecting pipes. The top of the enamel-lined condenser is connected to the material inlet and the top of the condenser is connected to the refrigerant outlet. The bottom of the enamel-lined condenser is connected to the material outlet and the bottom of the condenser is connected to the refrigerant inlet. The material inlet is connected to the material outlet through the material flow channel. The refrigerant inlet is connected to the refrigerant outlet through the cooling water flow channel.

[0009] The housing is located between an external connecting pipe and a cooling water flow channel. An input pipe and an output pipe are fixedly connected inside the housing. The input pipe is connected to the outlet of an external connecting pipe, and its outlet is connected to a tee. Each of the two outlets of the tee is connected to a filter cartridge. A filter screen is installed inside the filter cartridge. Each filter cartridge is connected to an output pipe through a connector. The outlet of the output pipe is connected to a cooling water flow channel. The filter screen is located above the connection between the tee and the filter cartridge, and below the connection between the filter cartridge and the connector.

[0010] As a further aspect of the present invention: a heat exchanger is fixedly installed inside the box, and a circulation pipe is provided inside the box. The circulation pipe is laid through the output pipe, and its inlet is connected to the output end of the heat exchanger, and its outlet is connected to the input end of the heat exchanger.

[0011] As a further aspect of the present invention: a control valve is provided on the tee, and a valve stem is slidably connected inside the control valve. The valve stem is driven to move by a drive source built into the control valve. One end of the valve stem extends into the tee, and two symmetrically arranged conical blocks are fixedly connected to this end. The radius of the conical block near the end of the tee is smaller than the radius away from the end of the tee, and the radius of the conical block away from the end of the tee is larger than the outlet radius of the tee. A butterfly valve is provided on each transition pipe, and a valve disc is rotatably installed inside the butterfly valve. A linkage component is provided on the control valve. When the drive source drives the valve stem to move, one conical block moves away from the tee, and the other conical block blocks the tee. At the same time, the movement of the valve stem drives one valve disc to rotate and open the transition pipe through the linkage component, while the other valve disc blocks the transition pipe.

[0012] As a further aspect of the present invention: the filter screen is detachably installed, and the top cover of the filter cylinder is detachably installed.

[0013] As a further embodiment of the present invention: the linkage component includes a gear and a rack plate, the two gears are respectively rotatably mounted on two butterfly valves, and the gears are coaxially and fixedly connected to the rotating shaft of the valve disc, the rack plate is slidably mounted on the control valve, and it is fixedly connected to the valve stem located inside the control valve, and both gears mesh with the rack plate.

[0014] As a further aspect of the present invention: a guide groove is provided in the material flow channel, and two adjacent inner connecting pipes are symmetrically arranged about the guide groove.

[0015] As a further aspect of the present invention: multiple guide plates are fixedly installed inside the cooling water flow channel to form a cross-flow channel.

[0016] As a further aspect of the present invention: multiple fixing rods are arranged around the outer circumference of the enamel condenser, and a clamping block is slidably installed at both the upper and lower ends of each fixing rod, and a nut is threaded to both ends of each fixing rod. When two clamping blocks approach each other, the two clamping blocks clamp the enamel condenser.

[0017] The beneficial effects of this invention are:

[0018] 1. In this invention, as the cooling water and high-temperature materials continuously exchange heat, the cooling water heats up and precipitates impurities. The heated cooling water, now containing impurities, then enters the input pipe through the external connecting pipe, and flows through a three-way valve to the filter cylinder. The filter screen in the middle of the filter cylinder intercepts the impurities precipitated in the cooling water, preventing them from returning to the cooling water flow channel and continuing to circulate. This helps maintain the cleanliness of the cooling water, avoids the accumulation of impurities in the heat exchange equipment, thereby reducing scaling, corrosion, and other problems, and extending the service life of the equipment.

[0019] 2. In this invention, since the filtered cooling water needs to pass through the output pipe before returning to the cooling water flow channel, the circulation pipe is laid through the output pipe. The low-temperature cooling water circulating in the circulation pipe can exchange heat with the cooling water that has been heated by heat exchange, thereby reducing the temperature of the cooling water that is about to return to the cooling water flow channel. On the one hand, it can reset the cooling water temperature and improve the heat exchange efficiency for the high-temperature material above. On the other hand, the cooled water after stabilization is less likely to precipitate impurities and other substances, thus avoiding the problem of impurities settling in the cooling water flow channel.

[0020] 3. In this invention, the number of filter cartridges is set to two, so that the filter cartridges can be used alternately. The filter screen in the idle filter cartridge can be replaced and cleaned to ensure the filtration effect of the filter screen and prevent impurities from entering the cooling water flow channel. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of the enamel condenser in this invention;

[0024] Figure 3 This is a schematic diagram of the disassembled structure of the enamel condenser in this invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the box in this invention;

[0026] Figure 5 This is a cross-sectional view of the filter cartridge structure in this invention;

[0027] Figure 6 This is a schematic diagram of the cone-shaped block in this invention;

[0028] Figure 7 This is a schematic diagram of the rack plate in this invention;

[0029] Figure 8 This is a schematic diagram of the guide groove in this invention;

[0030] Figure 9 This is a schematic diagram of the cooling water flow channel in this invention.

[0031] In the diagram: 1. Enameled condenser; 2. Material inlet; 3. Material outlet; 4. Refrigerant inlet; 5. Refrigerant outlet; 6. Internal connecting pipe; 7. External connecting pipe; 8. Material flow channel; 801. Guide groove; 9. Cooling water flow channel; 901. Baffle plate; 10. Housing; 11. Input pipe; 12. T-junction; 13. Filter cartridge; 14. Filter screen; 15. Transfer pipe; 16. Output pipe; 17. Circulation pipe; 18. Heat exchanger; 19. Conical block; 20. Valve stem; 21. Control valve; 22. Butterfly valve; 23. Valve disc; 24. Gear; 25. Rack plate; 26. Fixing rod; 27. Clamping block; 28. Nut. Detailed Implementation

[0032] 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.

[0033] Please see Figures 1-9 As shown, the present invention is a glass-lined circular flat plate three-hole plate condenser, comprising:

[0034] The enamel-lined condenser 1 has multiple staggered material flow channels 8 and cooling water flow channels 9 inside. Each cooling water flow channel 9 has multiple internal connecting pipes 6. The multiple material flow channels 8 at different heights are interconnected through the multiple internal connecting pipes 6. The multiple cooling water flow channels 9 at different heights are interconnected through multiple external connecting pipes 7. The top of the enamel-lined condenser 1 is connected to the material inlet 2 and its top is connected to the refrigerant outlet 5. The bottom of the enamel-lined condenser 1 is connected to the material outlet 3 and its bottom is connected to the refrigerant inlet 4. The material inlet 2 is connected to the material outlet 3 through the material flow channel 8. The refrigerant inlet 4 is connected to the refrigerant outlet 5 through the cooling water flow channel 9.

[0035] A housing 10 is disposed between an external connecting pipe 7 and a cooling water flow channel 9. An input pipe 11 and an output pipe 16 are fixedly connected inside the housing 10. The input pipe 11 is connected to the outlet of the external connecting pipe 7, and its outlet is connected to a tee 12. Both outlets of the tee 12 are connected to a filter cartridge 13. A filter screen 14 is disposed inside the filter cartridge 13. Each filter cartridge 13 is connected to the output pipe 16 through a connector 15. The outlet of the output pipe 16 is connected to a cooling water flow channel 9. The filter screen 14 is located above the connection between the tee 12 and the filter cartridge 13, and below the connection between the filter cartridge 13 and the connector 15.

[0036] In one embodiment, the enamel condenser 1 uses WH-I or WH-II type enamel. The main purpose of selecting enamel is because enamel has good heat transfer effect, excellent corrosion resistance, and is easy to maintain and clean. WH-I and WH-II type condensers have significant advantages such as corrosion resistance, easy cleaning, good thermal stability, high efficiency heat exchange, strong adaptability, energy saving and environmental protection, and customizability.

[0037] The working principle of this invention is as follows: First, high-temperature material is injected through material inlet 2, then enters the first-layer material flow channel 8, and then enters the next-layer material flow channel 8 through the inner connecting pipe 6. Finally, it flows from top to bottom through all material flow channels 8 and exits through material outlet 3. Cooling water is injected through refrigerant inlet 4, first filling the lowest cooling water flow channel 9, and then gradually filling the upper-layer cooling water flow channels 9 through the outer connecting pipe 7. Finally, it fills all cooling water flow channels 9 from bottom to top and exits through refrigerant outlet 5. The material flow channels 8 and cooling water flow channels 9 are staggered, so the high-temperature material will exchange heat with the cooling water flowing in the cooling water flow channels 9 during the flow of the material flow channel 8, thereby realizing a basic condensation process. As the heat exchange progresses, the temperature of the cooling water will rise. Specifically... The cooling water flowing in the upper cooling water channel 9 is significantly hotter than the cooling water in the lower cooling water channel 9. As the cooling water heats up, impurities inside it will precipitate out. At this time, the heated cooling water containing impurities will enter the input pipe 11 through the external connecting pipe 7. Then, the cooling water flows from the tee 12 into the filter cylinder 13, gradually filling the filter cylinder 13. The filter cylinder 13 is equipped with a filter screen 14, which can intercept the impurities precipitated in the cooling water. This allows clean cooling water to flow through the adapter pipe 15 into the output pipe 16 and then back into the cooling water channel 9 through the output pipe 16. This prevents impurities from returning to the cooling water channel 9 and continuing to circulate. This helps maintain the cleanliness of the cooling water and avoids the accumulation of impurities in the cooling water channel 9, thereby reducing problems such as scaling and corrosion.

[0038] like Figures 1-5 As shown, in a preferred embodiment of the present invention, a heat exchanger 18 is fixedly installed inside the housing 10, and a circulation pipe 17 is provided inside it. The circulation pipe 17 is arranged through the output pipe 16, and its inlet is connected to the output end of the heat exchanger 18, and its outlet is connected to the input end of the heat exchanger 18.

[0039] In one embodiment, it should be noted that the heat exchanger 18 described in this invention is prior art, and this invention does not improve upon it. Therefore, it is not necessary to disclose its specific mechanical and circuit structures, and this does not affect the integrity of this invention.

[0040] In practical application, since the filtered cooling water needs to pass through the output pipe 16 before returning to the cooling water channel 9, the circulation pipe 17 is installed through the output pipe 16. The low-temperature cooling water circulating in the circulation pipe 17 can exchange heat with the cooling water that has been heated by heat exchange, thereby reducing the temperature of the cooling water that is about to return to the cooling water channel 9. On the one hand, this can reset the cooling water temperature and improve the heat exchange efficiency for the high-temperature materials above. On the other hand, the cooled water after stabilization is also less likely to precipitate impurities and other substances, thus avoiding the problem of impurities settling in the cooling water channel 9.

[0041] like Figures 1-7 As shown in the preferred embodiment of the present invention, a control valve 21 is provided on the tee 12, and a valve stem 20 is slidably connected inside the control valve 21. The valve stem 20 is driven to move by a drive source built into the control valve 21. One end of the valve stem 20 extends into the tee 12, and two symmetrically arranged conical blocks 19 are fixedly connected to this end. The radius of the conical block 19 near the tee 12 is smaller than the radius of the end away from the tee 12, and the radius of the conical block 19 away from the tee 12 is larger than the outlet radius of the tee 12. A butterfly valve 22 is provided on each adapter pipe 15, and a valve disc 23 is rotatably installed inside the butterfly valve 22. A linkage component is provided on the control valve 21. When the drive source drives the valve stem 20 to move, one conical block 19 moves away from the tee 12, and the other conical block 19 blocks the tee 12. At the same time, the movement of the valve stem 20 drives one valve disc 23 to rotate and open the adapter pipe 15 through the linkage component, and the other valve disc 23 blocks the adapter pipe 15.

[0042] In one embodiment, the driving source can be an electric cylinder, a motor-driven screw and slider assembly, or other mechanisms capable of reciprocating motion. This embodiment does not impose specific limitations on these components. Each filter cartridge 13 is equipped with a drain valve.

[0043] In practical applications, this embodiment, such as Figure 6 As shown in the example, when cooling water enters the tee 12 from the inlet pipe 11, the conical block 19 opens the left filter cartridge 13, while the right filter cartridge 13 is closed by the conical block 19. Therefore, cooling water enters the left filter cartridge 13, and the left valve 23 opens. The cooling water, after being filtered by the filter screen 14, enters the outlet pipe 16 from the left adapter pipe 15 and eventually returns to the cooling water flow channel 9. However, after prolonged use of the left filter screen 14, its filtration efficiency decreases. At this time, the drive source drives the valve stem 20 to the right, and the conical block 19 will... The left filter cartridge 13 is blocked and the right filter cartridge 13 is opened. The rightward movement of the valve stem 20 will drive the left valve disc 23 through the linkage component to block the left adapter pipe 15 and open the right adapter pipe 15. At this time, the cooling water will flow through the right filter cartridge 13 and be filtered by the new filter screen 14 to ensure the filtration effect. Only one adapter pipe 15 is connected to the output pipe 16, which prevents the cooling water flowing into the output pipe 16 from flowing back into the idle filter cartridge 13. The cooling water in the idle filter cartridge 13 can be discharged through the drain valve.

[0044] like Figures 1-7 As shown, in a preferred embodiment of the present invention, the filter screen 14 is detachably installed, and the top cover of the filter cylinder 13 is detachably installed.

[0045] In practical applications, this embodiment uses a detachable design for both the filter screen 14 and the top cover of the filter cartridge 13. When one filter cartridge 13 is idle, the top cover of the filter cartridge 13 can be removed, and the filter screen 14 can be replaced or cleaned. This ensures the filter screen 14's ability to intercept and filter impurities without affecting the normal operation of the entire condensation system.

[0046] like Figures 1-7 As shown, in a preferred embodiment of the present invention, the linkage component includes a gear 24 and a rack plate 25. The two gears 24 are respectively rotatably mounted on two butterfly valves 22, and the gears 24 are coaxially and fixedly connected to the rotating shaft of the valve disc 23. The rack plate 25 is slidably mounted on the control valve 21, and it is fixedly connected to the valve stem 20 located inside the control valve 21. Both gears 24 mesh with the rack plate 25.

[0047] In practical application, when the drive source moves the valve stem 20, the valve stem 20 will drive the rack plate 25 to translate. Since the rack plate 25 and the gear 24 mesh, the translation of the rack plate 25 will drive the gear 24 to rotate, and the gear 24 will drive the valve disc 23 to rotate. In this way, one valve disc 23 will block the transfer pipe 15, while the other valve disc 23 will open the transfer pipe 15. Thus, the purpose of changing the cooling water flow channel can be achieved using only one power source, the drive source.

[0048] like Figures 1-8 As shown, in a preferred embodiment of the present invention, a guide groove 801 is provided in the material flow channel 8, and two adjacent inner connecting pipes 6 are symmetrically arranged about the guide groove 801.

[0049] In practical application, when the high-temperature material flows from the first material flow channel 8 through the inner connecting pipe 6 to the second material flow channel 8, the high-temperature material will be guided by the guide groove 801 to flow into the inner connecting pipe 6 of the second material flow channel 8, and then continue to flow down to the third material flow channel 8. This back-and-forth flow will eventually discharge the heat-cooled material through the material outlet 3. The guide groove 801 plays the role of guiding the material in the material flow channel 8 to the outlet in an orderly manner, avoiding accumulation in the material flow channel 8.

[0050] like Figure 9 As shown, in a preferred embodiment of the present invention, a plurality of guide plates 901 are fixedly installed in the cooling water flow channel 9 to form a cross-flow channel.

[0051] In practical application, when the cooling water flows in the cooling water channel 9, it is blocked and guided by the guide plate 901, so that the cooling water flows crosswise in each layer of the cooling water channel 9, allowing the cooling water to stay in each layer for a longer time, thereby enabling it to fully exchange heat with the high-temperature material in the material channel 8 and improve the heat exchange efficiency.

[0052] like Figures 1-3 As shown, in a preferred embodiment of the present invention, a plurality of fixing rods 26 are arranged around the outer circumference of the enamel condenser 1. A clamping block 27 is slidably installed at both the upper and lower ends of the fixing rod 26, and a nut 28 is threadedly connected to both ends of the fixing rod 26. When the two clamping blocks 27 approach each other, the two clamping blocks 27 clamp the enamel condenser 1.

[0053] In practical application, the overall height of the enamel condenser 1 can be changed by altering the number of layers in the material flow channel 8 and the cooling water flow channel 9. The clamping block 27 is slidably mounted on the fixed rod 26. When the height of the enamel condenser 1 changes, the clamping block 27 can slide on the fixed rod 26, ensuring that the clamping block 27 always abuts against the enamel condenser 1. Then, the nut 28 is tightened, thereby clamping the enamel condenser 1 with the upper and lower clamping blocks 27. In this way, the height of the enamel condenser 1 can be adjusted according to production needs.

[0054] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A glass-lined circular flat plate three-hole condenser, characterized in that, include: The enamel condenser (1) is provided with multiple staggered material flow channels (8) and cooling water flow channels (9). Each cooling water flow channel (9) is provided with multiple internal connecting pipes (6). Multiple material flow channels (8) of different heights are interconnected through multiple internal connecting pipes (6). Multiple cooling water flow channels (9) of different heights are interconnected through multiple external connecting pipes (7). The top of the enamel condenser (1) is connected to the material inlet (2) and its top is connected to the refrigerant outlet (5). The bottom of the enamel condenser (1) is connected to the material outlet (3) and its bottom is connected to the refrigerant inlet (4). The material inlet (2) is connected to the material outlet (3) through the material flow channel (8). The refrigerant inlet (4) is connected to the refrigerant outlet (5) through the cooling water flow channel (9). The housing (10) is located between an external connecting pipe (7) and a cooling water channel (9). An input pipe (11) and an output pipe (16) are fixedly connected inside the housing (10). The input pipe (11) is connected to the outlet of an external connecting pipe (7), and its outlet is connected to a tee (12). Both outlets of the tee (12) are connected to a filter cylinder (13). A filter screen (14) is installed inside the filter cylinder (13). Each filter cylinder (13) is connected to the output pipe (16) through a connector (15). The outlet of the output pipe (16) is connected to a cooling water channel (9). The filter screen (14) is located above the connection between the tee (12) and the filter cylinder (13), and below the connection between the filter cylinder (13) and the connector (15). A heat exchanger (18) is fixedly installed inside the housing (10), and a circulation pipe (17) is provided inside it. The circulation pipe (17) is laid through the output pipe (16), and its inlet is connected to the output end of the heat exchanger (18), and its outlet is connected to the input end of the heat exchanger (18). A control valve (21) is provided on the tee (12). A valve stem (20) is slidably connected inside the control valve (21). The valve stem (20) is driven to move by a drive source built into the control valve (21). One end of the valve stem (20) extends into the tee (12), and two symmetrically arranged conical blocks (19) are fixedly connected to this end. The radius of the conical block (19) near the end of the tee (12) is smaller than the radius of the end away from the tee (12), and the radius of the conical block (19) away from the tee (12) is larger than the radius of the end of the tee (12). 2) Outlet radius, each transfer pipe (15) is equipped with a butterfly valve (22), and a valve disc (23) is rotatably installed inside the butterfly valve (22). The control valve (21) is equipped with a linkage component. When the drive source drives the valve stem (20) to move, one cone block (19) moves away from the tee (12), and another cone block (19) blocks the tee (12). At the same time, the valve stem (20) moves through the linkage component to drive one valve disc (23) to rotate and open the transfer pipe (15), and the other valve disc (23) blocks the transfer pipe (15).

2. The glass-lined circular flat plate three-hole plate condenser according to claim 1, characterized in that, The filter screen (14) is detachable, and the top cover of the filter cylinder (13) is detachable.

3. A glass-lined circular flat plate three-hole condenser according to claim 2, characterized in that, The linkage assembly includes a gear (24) and a rack (25). The two gears (24) are rotatably mounted on two butterfly valves (22), and the gears (24) are coaxially and fixedly connected to the rotating shaft of the valve disc (23). The rack (25) is slidably mounted on the control valve (21), and it is fixedly connected to the valve stem (20) located inside the control valve (21). Both gears (24) mesh with the rack (25).

4. A glass-lined circular flat plate three-hole condenser according to claim 1, characterized in that, The material flow channel (8) is provided with a guide groove (801), and the two adjacent inner connecting pipes (6) are symmetrically arranged about the guide groove (801).

5. A glass-lined circular flat plate three-hole plate condenser according to claim 1, characterized in that, Multiple guide plates (901) are fixedly installed inside the cooling water flow channel (9) to form a cross-flow channel.

6. A glass-lined circular flat plate three-hole condenser according to claim 1, characterized in that, The enamel condenser (1) has multiple fixing rods (26) arranged around its outer circumference. Each fixing rod (26) has a clamping block (27) slidably installed at both ends. Each fixing rod (26) has a nut (28) threadedly connected to both ends. When the two clamping blocks (27) approach each other, the two clamping blocks (27) clamp the enamel condenser (1).

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