A bimetallic temperature control self-adjusting type injection pump nozzle structure

Abstract

The application discloses a bimetal temperature control self-adjusting type injection pump nozzle structure, which comprises a conical guide plate with gradually reduced flow area, a conical control valve arranged at the outflow end of the conical guide plate, and a temperature-sensitive adjusting part in communication with the outflow end of the conical guide plate; the temperature-sensitive adjusting part comprises an inner metal layer arranged at the middle part, the inner metal layer is hollow to form a control channel in communication with the conical guide plate, an insulating connecting layer is arranged outside the inner metal layer, and an outer metal layer is arranged outside the insulating connecting layer. The bimetal temperature control self-adjusting type injection pump nozzle structure adopts a series arrangement form of the conical control valve and the temperature-sensitive adjusting part, so that a double regulation system combining coarse adjustment and fine adjustment is ensured, the temperature-sensitive adjusting part controls the cross-sectional area of the control channel by matching the inner metal layer and the outer metal layer with different thermal expansion coefficients through the insulating connecting layer, and better control effect is provided.

Description

Technical Field

[0001] This application relates to a bimetallic temperature-controlled self-adjusting jet pump nozzle structure. Background Technology

[0002] Central heating systems are an important energy infrastructure in urban areas, and their operational efficiency directly affects energy consumption and environmental protection. In secondary heating networks, jet pumps are key equipment for mixing high-temperature supply water with low-temperature return water, thereby regulating the temperature and pressure of the supply and distribution water, and playing an important role in maintaining the hydraulic balance and thermal stability of the network.

[0003] Currently, there are two main technical solutions for jet pumps in heating networks: one is a fixed nozzle, which has a simple structure but cannot adapt to changes in operating conditions, leading to low energy efficiency and hydraulic imbalance; the other is an externally driven adjustable nozzle, which, although adjustable, suffers from complex structure, reliance on external power, high cost, and high failure rate. Existing technologies struggle to balance adjustment performance and structural reliability. Therefore, it is necessary to improve the existing jet pump nozzle structure to minimize or mitigate the aforementioned problems. Utility Model Content

[0004] To address the aforementioned issues, this application proposes a bimetallic temperature-controlled self-regulating jet pump nozzle structure, comprising a conical guide plate with a gradually decreasing flow area, a conical control valve at the outlet end of the conical guide plate, and a temperature-sensitive regulating section connected to the outlet end of the conical guide plate. The temperature-sensitive regulating section includes an inner metal layer located in the middle, hollowed out to form a control channel communicating with the conical guide plate. An insulating connecting layer is located on the outer side of the inner metal layer, and an outer metal layer is located on the outer side of the insulating connecting layer. This application employs a series arrangement of the conical control valve and the temperature-sensitive regulating section to ensure a dual regulating system combining coarse and fine adjustments. The temperature-sensitive regulating section controls the cross-sectional area of ​​the control channel by using the insulating connecting layer to coordinate the inner and outer metal layers with different coefficients of thermal expansion, thus providing better control performance.

[0005] Preferably, an external connecting threaded section is provided at the outlet end of the conical guide plate, and a fixing pressure ring is sleeved on the outside of the outer metal layer. The fixing pressure ring includes an outer pressure ring provided on the outside of the temperature-sensitive adjustment part, and an annular connecting plate is provided on the outside of the outer pressure ring. An internal connecting threaded section is provided on one side of the annular connecting plate corresponding to the external connecting threaded section.

[0006] Preferably, the inner metal layer is a copper metal layer; the outer metal layer is a nickel-titanium alloy metal layer; and the insulating connection layer is an epoxy resin layer. This application directly transmits temperature changes to the entire diaphragm by adjusting the contact between the return water fluid in the heating network and the copper metal layer of the temperature-sensitive regulating unit. Utilizing the difference in thermal expansion coefficients between the nickel-titanium alloy metal layer and the copper metal layer, the temperature-sensitive regulating unit is driven to deform towards the desired state. Through this deformation, the effective flow area of ​​the main through-hole is dynamically reduced, thereby regulating the fluid flow rate and ejection capability.

[0007] Preferably, the conical control valve includes a fixed valve seat, a conical valve body is disposed inside the fixed valve seat, the conical valve body extends to the outside of the fixed valve seat and is provided with an adjusting nut.

[0008] Preferably, the conical valve body includes a vertical valve stem, and an adjusting head with a gradually narrowing cross-section is provided at the bottom of the vertical valve stem. The adjusting head is configured to cooperate with the control channel.

[0009] Preferably, the control channel is a regular polygonal channel.

[0010] Preferably, a water inlet chamber is provided on the outer side of the conical guide plate, and the outlet of the water inlet chamber is positioned opposite to the control channel. The mixing chamber is connected to the water inlet chamber through the outlet of the water inlet chamber. A diffuser chamber with gradually increasing flow area is provided on the rear side of the mixing chamber. This application effectively solves the problems of hydraulic imbalance and high energy consumption of traditional jet pumps under varying operating conditions through passive adaptive regulation, and reduces the frequency of valve operation, thereby reducing energy consumption. It has the advantages of simple structure, reliable operation, and significant energy-saving effect.

[0011] Preferably, the diffuser chamber is a conical space.

[0012] This application can bring the following beneficial effects: 1. This application uses a conical control valve and the temperature-sensitive regulating unit arranged in series to ensure a dual regulating system that combines coarse and fine adjustment. The temperature-sensitive regulating unit controls the cross-sectional area of ​​the control channel by using an insulating connecting layer to combine inner and outer metal layers with different coefficients of thermal expansion, thus providing better control performance.

[0013] 2. This application directly transmits temperature changes to the entire diaphragm by adjusting the contact between the return water fluid in the heating network and the copper metal layer of the temperature-sensitive regulating part. By utilizing the difference in the thermal expansion coefficients between the nickel-titanium alloy metal layer and the copper metal layer, the temperature-sensitive regulating part is driven to deform towards the desired state. Through the above deformation, the effective flow area of ​​the main through hole is dynamically reduced, thereby adjusting the fluid flow rate and ejection capacity.

[0014] 3. This application effectively solves the problems of hydraulic imbalance and high energy consumption of traditional jet pumps under varying operating conditions through passive adaptive adjustment, and reduces the frequency of valve body operation, thereby reducing energy consumption. It has the advantages of simple structure, reliable operation and significant energy saving effect. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of this application.

[0016] Figure 2 This is a schematic diagram of the temperature-sensitive regulating section.

[0017] Figure 3 This is a schematic diagram of a structure including a water intake chamber and other components.

[0018] Figure 4 This is a schematic diagram of a conical guide vane with a temperature-sensitive adjustment section.

[0019] Figure 5 This is a schematic diagram of the conical guide vane.

[0020] Figure 6 This is a schematic diagram showing the deformation of the temperature-sensitive adjustment unit. Detailed Implementation

[0021] To clearly illustrate the technical features of this solution, the following detailed description, in conjunction with the accompanying drawings, will be provided.

[0022] In the first embodiment, such as Figure 1-2 As shown, a bimetallic temperature-controlled self-adjusting jet pump nozzle structure includes a conical guide plate 1 with a gradually decreasing flow area, a conical control valve 2 provided at the outlet end of the conical guide plate 1, and a temperature-sensitive adjustment part 3 connected to the outlet end of the conical guide plate 1; the temperature-sensitive adjustment part 3 includes an inner metal layer 4 located in the middle, the inner metal layer 4 is hollow and forms a control channel 5 connected to the conical guide plate 1, an insulating connection layer 6 is provided on the outside of the inner metal layer 4, and an outer metal layer 7 is provided on the outside of the insulating connection layer 6.

[0023] In use, the fluid is first introduced into the conical guide plate 1, and then enters the temperature-sensitive regulating section 3 after being regulated by the conical control valve 2. When the fluid temperature is detected to be higher than the set value, it indicates that the system's heat load demand has decreased or there is an ineffective cycle. The outer metal layer 7 in the temperature-sensitive regulating section 3 expands significantly more than the inner metal layer 4 under thermal stress, and generates elastic deformation towards the outlet direction. This deformation further drives the core control channel 5 to generate strict geometric similarity contraction, the flow area decreases proportionally, and the jet velocity increases, thereby effectively suppressing the proportion of high-temperature return water. Conversely, when the return water temperature is lower than the set value, the diaphragm heat load decreases, and under the elastic recovery force of the material itself and the dominance of the inner metal layer 4, it rebounds, causing the opening of the control channel 5 to increase and the jet velocity to decrease in order to adapt to higher heat load demands.

[0024] In the second embodiment, as Figure 1-6 As shown, a bimetallic temperature-controlled self-adjusting jet pump nozzle structure includes a conical guide plate 1 with a gradually decreasing flow area, a conical control valve 2 provided at the outlet end of the conical guide plate 1, and a temperature-sensitive adjustment part 3 connected to the outlet end of the conical guide plate 1; the temperature-sensitive adjustment part 3 includes an inner metal layer 4 located in the middle, the inner metal layer 4 is hollow and forms a control channel 5 connected to the conical guide plate 1, an insulating connection layer 6 is provided on the outside of the inner metal layer 4, and an outer metal layer 7 is provided on the outside of the insulating connection layer 6.

[0025] An external connecting threaded section 8 is provided at the outlet end of the conical guide plate 1, and a fixing pressure ring 9 is sleeved on the outside of the outer metal layer 7. The fixing pressure ring 9 includes an outer pressure ring 10 provided on the outside of the temperature-sensitive adjustment part 3, and an annular connecting plate 11 is provided on the outside of the outer pressure ring 10. An inner connecting threaded section is provided on one side of the annular connecting plate 11 corresponding to the external connecting threaded section 8.

[0026] The inner metal layer 4 is a copper metal layer; the outer metal layer 7 is a nickel-titanium alloy metal layer; and the insulating connection layer 6 is an epoxy resin layer. The conical control valve 2 includes a fixed valve seat 13, within which a conical valve body 12 is disposed. The conical valve body 12 extends to the outside of the fixed valve seat 13 and is fitted with an adjusting nut 14. The conical valve body 12 includes a vertical valve stem 15, and at the bottom of the vertical valve stem 15 is an adjusting head 16 with a gradually tapering cross-section. The adjusting head 16 is configured to cooperate with the control channel 5. The control channel 5 is a regular polygonal channel.

[0027] A water inlet chamber 17 is provided on the outer side of the conical guide plate 1. The outlet 18 of the water inlet chamber 17 is positioned opposite to the control channel 5. The mixing chamber 20 is connected to the water inlet chamber 17 through the outlet 18 of the water inlet chamber 17. A diffuser chamber 19 with gradually increasing flow area is provided on the rear side of the mixing chamber 20. The diffuser chamber 19 is a conical space.

[0028] In operation, the fluid is first introduced into the conical guide plate 1, and then, after being regulated by the conical control valve 2, enters the temperature-sensitive regulating section 3. When the fluid temperature is detected to be higher than the set value, it indicates that the system's heat load demand has decreased or there is an ineffective cycle. The outer metal layer 7 in the temperature-sensitive regulating section 3 expands significantly more than the inner metal layer 4 under thermal stress, and under the drive of thermal differential stress, it generates elastic deformation toward the outlet direction. This deformation further drives the core control channel 5 to generate strict geometric similarity contraction, the flow area decreases proportionally, and the jet velocity increases, thereby effectively suppressing the proportion of high-temperature return water. Conversely, when the return water temperature is lower than the set value, the diaphragm heat load decreases, and under the elastic recovery force of the material itself and the dominance of the inner metal layer 4, it rebounds, causing the opening of the control channel 5 to increase and the jet velocity to decrease in order to meet the higher heat load demand. Then it enters the water inlet chamber 17 and enters the diffuser chamber 19 through the control channel 5, thus completing the process of injection, mixing, and pressurization.

[0029] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A bimetallic temperature-controlled self-adjusting jet pump nozzle structure, characterized in that: The device includes a tapered guide plate with a gradually decreasing flow area, a tapered control valve at the outlet end of the tapered guide plate, and a temperature-sensitive regulating part connected to the outlet end of the tapered guide plate. The temperature-sensitive regulating part includes an inner metal layer located in the middle, which is hollow and forms a control channel connected to the tapered guide plate. An insulating connecting layer is provided on the outside of the inner metal layer, and an outer metal layer is provided on the outside of the insulating connecting layer.

2. The bimetallic temperature-controlled self-adjusting jet pump nozzle structure as described in claim 1, characterized in that: An external connecting threaded section is provided at the outlet end of the conical guide plate, and a fixing pressure ring is sleeved on the outside of the outer metal layer. The fixing pressure ring includes an outer pressure ring provided on the outside of the temperature-sensitive adjustment part, and an annular connecting plate is provided on the outside of the outer pressure ring. An internal connecting threaded section is provided on one side of the annular connecting plate corresponding to the external connecting threaded section.

3. The bimetallic temperature-controlled self-adjusting jet pump nozzle structure as described in claim 1, characterized in that: The inner metal layer is a copper metal layer; the outer metal layer is a nickel-titanium alloy metal layer; and the insulating connection layer is an epoxy resin layer.

4. The bimetallic temperature-controlled self-adjusting jet pump nozzle structure as described in claim 1, characterized in that: The conical control valve includes a fixed valve seat, a conical valve body disposed inside the fixed valve seat, the conical valve body extending to the outside of the fixed valve seat and having an adjusting nut disposed thereon.

5. The bimetallic temperature-controlled self-adjusting jet pump nozzle structure as described in claim 4, characterized in that: The conical valve body includes a vertical valve stem, and an adjusting head with a gradually narrowing cross-section is provided at the bottom of the vertical valve stem. The adjusting head is configured to cooperate with the control channel.

6. The bimetallic temperature-controlled self-adjusting jet pump nozzle structure as described in claim 1, characterized in that: The control channel is a regular polygonal channel.

7. The bimetallic temperature-controlled self-adjusting jet pump nozzle structure as described in claim 1, characterized in that: A water inlet chamber is provided on the outside of the conical guide plate. The outlet of the water inlet chamber is positioned opposite to the control channel. The mixing chamber is connected to the water inlet chamber through the outlet of the water inlet chamber. A diffuser chamber with gradually increasing flow area is provided on the rear side of the mixing chamber.

8. The bimetallic temperature-controlled self-adjusting jet pump nozzle structure as described in claim 7, characterized in that: The diffuser chamber is a conical space.

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