A large capacity automatic drain valve pump

Abstract

This utility model relates to the field of steam trap technology, specifically a large-capacity automatic steam trap pump, comprising: a pump body, a pump cover on top of the pump body with an inlet and a outlet on both sides, an inlet check valve at the inlet, a valve cover at the outlet, and an outlet check valve on the rear side of the valve cover; a pump assembly functional module on the pump cover, the pump assembly functional module including an inlet / outlet valve assembly, a float, and a linkage mechanism, the linkage mechanism connecting the float and the inlet / outlet valve assembly; a steam trap valve corresponding to the outlet in the pump body, connected to the float; and an outlet valve on the valve cover, higher than the steam trap valve. When the steam system pressure is sufficient, the built-in steam trap operates normally to drain water; when the system pressure drops to a stagnant state, the condensate recovery pump inside the pump automatically starts, providing power to discharge condensate from the steam trap valve, achieving automatic switching.

Description

Technical Field

[0001] This utility model relates to the field of steam trap technology, and specifically to a large-capacity automatic steam trap pump. Background Technology

[0002] Heat exchanger equipment typically requires steam pressure regulation to achieve precise control of hot water outlet temperature. However, continuous pressure changes can cause all heat exchanger systems to experience a "lag" problem: that is, the system cannot effectively discharge condensate due to insufficient pressure driving the condensate through the steam trap.

[0003] Under stagnant conditions, heat exchanger equipment may experience partial or complete water accumulation, potentially leading to the following problems: 1. Risk of water hammer: In severe cases, it may cause water hammer. 2. Equipment corrosion: Carbon dioxide and non-condensable gases accumulated in the system dissolve into the cooled condensate to form carbonic acid, leading to equipment corrosion; 3. Heating element damage: The controller shutting down during the adjustment process may cause abnormal internal pressure in the equipment, damaging the heating element; 4. Temperature control inaccuracy: Water accumulation leads to a decrease in temperature control accuracy.

[0004] To address this issue, the traditional solution typically involves adding a pipeline downstream of the equipment requiring condensate drainage, connecting a separate pump in series, and then adding a separate steam trap after the pump via a pipeline. Figure 1 As shown.

[0005] However, this solution has significant drawbacks: 1. Large size and complex design: The overall size of the device is large, and the steam traps with different models and sizes need to be selected according to the amount of condensate, which leads to complex pipeline connection design and high difficulty in equipment serialization.

[0006] 2. Difficult installation and maintenance: The numerous interfaces, sealing surfaces, and complex shapes make pipeline insulation construction difficult. Furthermore, post-weld pipeline inspection and other procedures are required, further complicating installation and maintenance. Utility Model Content

[0007] This invention provides a large-capacity automatic drain valve pump to address the problems of existing technologies.

[0008] The objective of this utility model can be achieved through the following technical solution: A large-capacity automatic drain valve pump, comprising: a pump body, a pump cover on the top of the pump body and an inlet and a outlet on both sides, an inlet check valve at the inlet, a valve cover at the outlet, a outlet check valve on the rear side of the valve cover, a pump group functional module on the pump cover, the pump group functional module including an air inlet / air outlet valve assembly, a float and a linkage mechanism, the linkage mechanism being used to connect the float and the air inlet / air outlet valve assembly, a drain valve in the pump body corresponding to the outlet, the drain valve being connected to the float, and an air vent valve on the valve cover, the air vent valve being located above the drain valve.

[0009] In a further improvement, the intake and exhaust valve assembly includes an intake valve assembly, an exhaust valve assembly, and a T-bar. The intake valve assembly includes an intake valve seat and an intake valve core, and the exhaust valve assembly includes an exhaust valve seat and an exhaust valve core. The intake valve seat and the exhaust valve seat are fixed on the pump cover. The intake valve core and the exhaust valve core are respectively connected to both sides of the T-bar, and the T-bar is connected to the linkage mechanism.

[0010] In a further improvement, the drain valve is connected to the float via a linkage mechanism.

[0011] A further improvement is made to the linkage mechanism, which includes a fixed plate disposed inside the pump body and A first connecting rod, one end of which is pivotally connected to the fixed plate and the other end of which is connected to the float; The second link has one end pivotally connected to the middle of the first link and the other end extending upward; The third link, one end of which is pivotally connected to the top of the second link and the other end extends upward at an angle; The fourth link has one end pivotally connected to the top of the third link and the other end extending downward at an angle, and the middle part of the fourth link is pivotally connected to the fixed plate. The fifth link, one end of which is pivotally connected to the bottom end of the fourth link and the other end of which is connected to the T-shaped bar; The fixing plate is provided with a first limiting pin at the position corresponding to the first connecting rod. The first limiting pin is used to limit the downward movement of the end of the first connecting rod connected to the float. The fixing plate is provided with a second limiting pin at the position corresponding to the fourth link. The second limiting pin is used to limit the upward movement of the end of the fourth link connected to the third link. A spring is provided between the second link and the fourth link.

[0012] In a further improvement, the steam trap includes a steam trap seat, a valve stem is provided on the steam trap seat, a main valve core and a secondary valve core are provided on the valve stem, and one end of the valve stem extends to the steam trap seat and is connected to the linkage mechanism.

[0013] In a further improvement, the end of the first connecting rod that is pivotally connected to the fixed plate extends outward to form a power rod, and the power rod is pivotally connected to the valve stem via a movable pin.

[0014] In a further improvement, the valve seat of the steam trap is provided with a guide structure one and a guide structure two, the main valve core is slidably disposed on the guide structure one, and the auxiliary valve core is slidably disposed on the guide structure two.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the steam system pressure is sufficient, the built-in steam trap will operate normally to drain water; when the system pressure drops to a stagnant state, the condensate recovery pump inside the pump will automatically start to provide power to discharge the condensate from the steam trap, thus achieving automatic switching. 2. The pump body cavity and the steam trap cavity of this utility model are combined into one, and a shared float structure is adopted to reduce the overall volume; 3. This utility model can conveniently meet the needs of different condensate discharge volumes by configuring valve seats with different drainage port diameters and valve cores with corresponding diameters for steam traps. While maintaining the inherent large discharge volume advantage of steam traps, it integrates the large discharge volume characteristics of condensate recovery pumps, achieving complementary advantages. 4. The overall structure of this utility model is compact, which facilitates the standardization and serialization of products and makes the equipment widely applicable. Attached Figure Description

[0016] Figure 1 A schematic diagram of a drainage method in existing technology that involves adding an independent pump body and a steam trap to a pipeline; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of the float, connecting rod mechanism and drain valve in this utility model. Figure 4 This is a diagram showing the working state of the steam source for the pump unit of this utility model. Figure 5 This is a diagram showing the working state of the exhaust steam source of the pump unit according to this utility model; Figure 6 This is a structural diagram of the steam trap in this utility model.

[0017] In the diagram, 1. Inlet check valve; 2. Pump body; 3. Pump body flange; 4. Pump unit functional module; 4.1. Spring; 4.2. Linkage mechanism; 4.3. Inlet valve seat; 4.4. Inlet valve core; 4.5. Exhaust valve core; 4.6. Exhaust valve seat; 4.7. T-bar; 4.8. Fourth link; 4.9. Third link; 4.10. Second link; 4.11. First link; 4.12. Float; 4.13. Movable pin; 4.14. Fixed plate; 4.15. Exhaust valve; 6. Pump cover; 7. Drain valve; 7.1. Valve stem; 7.2. Main valve core; 7.3. Guide structure one; 7.4. Drain valve seat; 7.5. Secondary valve core; 7.6. Guide structure two; 8. Pump body outlet flange; 9. Valve cover; 10. Drain check valve. Detailed Implementation

[0018] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The following is a description of the embodiments and appendices. Figures 1-6 The technical solution of this utility model will be further described below.

[0021] Example 1 A high-capacity automatic drain valve pump includes: a pump body 2, a pump cover 6 on the top of the pump body 2 and inlet and outlet ports on both sides, an inlet check valve 1 at the inlet port, a valve cover 9 at the outlet port, an outlet check valve 10 on the rear side of the valve cover 9, a pump assembly functional module 4 on the pump cover 6, the pump assembly functional module 4 including an inlet / outlet valve assembly, a float 4.12 and a linkage mechanism 4.2, the linkage mechanism 4.2 connecting the float 4.12 and the inlet / outlet valve assembly, and a drain valve 7 inside the pump body 2 corresponding to the outlet port. Valve 7 is connected to float 4.12. An exhaust valve 5 is provided on the valve cover 9 and is located on the upper side of the drain valve 7. The intake and exhaust valve assembly includes an intake valve assembly, an exhaust valve assembly, and a T-bar 4.7. The intake valve assembly includes an intake valve seat 4.3 and an intake valve core 4.4. The exhaust valve assembly includes an exhaust valve seat 4.6 and an exhaust valve core 4.5. The intake valve seat 4.3 and the exhaust valve seat are fixed to the pump cover 6. The intake valve core 4.4 and the exhaust valve core 4.5 are respectively connected to both sides of the T-bar 4.7. The T-bar 4.7 is connected to the linkage mechanism 4.2.

[0022] like Figure 2 As shown, the present invention has a pump body flange 3 welded on the top of the pump body 2, a pump cover 6 connected to the pump body flange 3 by bolts, a pump body outlet flange 8 welded at the drain outlet of the pump body 2, a valve cover 9 connected to the pump body outlet flange 8 by bolts, and a drain outlet check valve 10 threadedly connected to the valve cover 9.

[0023] Even under very low pressure conditions, exhaust valve 5 can release air and carbon dioxide through a separate exhaust port.

[0024] refer to Figure 4 and Figure 5 The intake valve assembly is connected to the steam power source and controls the on and off of the power source through the steel ball in the intake valve seat 4.3; the exhaust valve assembly is connected to the water collection tank to recover waste heat.

[0025] When in exhaust state, such as Figure 4 As shown, the float 4.12 is in the lower position, the T-shaped rod 4.7 is in the downward position, the steel ball in the intake valve seat 4.3 is in the lower position, the intake valve assembly is closed, and at the same time the exhaust valve core 4.5 is open to exhaust, ensuring that condensate flows into the pump body 2; When in the steam intake state, such as Figure 5 As shown, when the float 4.12 is in a high position and the T-shaped rod 4.7 is in an upward position, the intake valve core 4.4 pushes open the steel ball in the intake valve seat 4.3, and the power air source flows into the pump body 2. At the same time, the exhaust valve core 4.5 closes, and pressure is built up in the pump body 2.

[0026] As a further preferred embodiment, the drain valve 7 is connected to the float 4.12 via a linkage mechanism 4.2.

[0027] As a further preferred embodiment, the linkage mechanism 4.2 includes a fixing plate 4.14 disposed inside the pump body 2 and The first connecting rod 4.11 has one end pivotally connected to the fixed plate 4.14 and the other end connected to the float 4.12; The second link 4.10 has one end pivotally connected to the middle of the first link 4.11 and the other end extending upward; The third link 4.9, one end of which is pivotally connected to the top of the second link 4.10 and the other end extends upward at an angle; The fourth link 4.8 has one end pivotally connected to the top of the third link 4.9 and the other end extending downward at an angle, and the middle part of the fourth link 4.8 is pivotally connected to the fixed plate 4.14; The fifth link, one end of which is pivotally connected to the bottom end of the fourth link 4.8 and the other end of which is connected to the T-shaped link 4.7; The fixing plate 4.14 is provided with a first limiting pin at the position corresponding to the first connecting rod 4.11. The first limiting pin is used to limit the downward movement of the end of the first connecting rod 4.11 connected to the float 4.12. The fixing plate 4.14 is provided with a second limiting pin at the position corresponding to the fourth link 4.8. The second limiting pin is used to limit the upward movement of the end of the fourth link 4.8 connected to the third link 4.9. A spring 4.1 is provided between the second link 4.10 and the fourth link 4.8.

[0028] Specifically, one end of the first link 4.11 is pivotally mounted on the fixed plate 4.14, allowing it to rotate and swing around the pivot point, while the other end is connected to the float 4.12. The float 4.12, subjected to buoyancy in the liquid, causes the first link 4.11 to swing around the pivot point. One end of the second link 4.10 is pivotally connected to the middle of the first link 4.11, allowing it to rotate and swing relative to the first link 4.11, while the other end extends upwards. One end of the third link 4.9 is pivotally connected to the top of the second link 4.10, allowing it to move with the swinging of the second link 4.10, while the other end extends upwards at an angle. One end of the fourth link 4.8 is pivotally connected to the top of the third link 4.9, while the other end extends downwards at an angle, and its middle portion is pivotally mounted on the fixed plate 4.14, allowing it to swing around the pivot point in its middle portion. One end of the fifth link is pivotally connected to the bottom end of the fourth link 4.8, while the other end is connected to the T-link 4.7, thus realizing the linkage between the linkage mechanism and the T-link 4.7.

[0029] To limit the range of motion of the linkage, a first limiting pin is provided on the fixed plate 4.14 at the position corresponding to the first linkage 4.11. This pin limits the downward movement of the end of the first linkage 4.11 connected to the float 4.12, preventing the float 4.12 from sinking too much and affecting the normal operation of the linkage mechanism. Similarly, a second limiting pin is provided on the fixed plate 4.14 at the position corresponding to the fourth linkage 4.8. This pin limits the upward movement of the end of the fourth linkage 4.8 connected to the third linkage 4.9, preventing the fourth linkage 4.8 from tilting excessively upward and causing imbalance in the linkage mechanism. In addition, a spring 4.1 is provided between the second linkage 4.10 and the fourth linkage 4.8. The spring 4.1 provides a certain elastic restoring force during the movement of the linkage mechanism, allowing each linkage to reset promptly after being subjected to external force, ensuring the stable operation of the linkage mechanism.

[0030] As a further preferred embodiment, the steam trap 7 includes a steam trap seat 7.4, on which a valve stem 7.1 is provided. A main valve core 7.2 and a secondary valve core 7.5 are provided on the valve stem 7.1. One end of the valve stem 7.1 extends to the steam trap seat 7.4 and is connected to the linkage mechanism 4.2.

[0031] Specifically, when the linkage mechanism 4.2 moves due to the buoyancy of the float 4.12, the main valve core 7.2 and the auxiliary valve core 7.5 move accordingly through the valve stem 7.1, thereby controlling the opening and closing of the steam trap and achieving effective control of steam and condensate.

[0032] As a further preferred embodiment, the end of the first connecting rod 4.11 that is pivotally connected to the fixed plate 4.14 extends outward to form a power rod 4.15, which is pivotally connected to the valve stem 7.1 via a movable pin.

[0033] Specifically, when the float 4.12 is subjected to buoyancy, it will drive the power rod 4.15 to move through the first connecting rod 4.11, which in turn drives the valve stem 7.1 to move up and down, thereby opening and closing the steam trap and ensuring the stable operation of the steam system.

[0034] As a further preferred embodiment, the drain valve seat 7.4 is provided with a first guide structure 7.3 and a second guide structure 7.6, the main valve core 7.2 is slidably disposed on the first guide structure 7.3, and the auxiliary valve core 7.5 is slidably disposed on the second guide structure 7.6.

[0035] Specifically, when the float 4.12 floats up and down, the valve body guide structure ensures that the main and auxiliary valve cores 7.5 of the steam trap move in the vertical direction, while the movable pin 4.13 on the valve stem 7.1 slides back and forth along the elliptical elongated hole at the end of the power rod as the power rod rotates.

[0036] The working principle of the large-capacity automatic steam trap pump in this embodiment is as follows: In this embodiment, the exhaust valve is a thermostatic air exhaust valve, and the steam trap is a double-seat float-type steam trap. When the equipment starts, under the pressure of the system pipeline, air and condensate flow into the inner cavity of the pump body 2 through the inlet check valve 1. Air is mainly discharged through the vent valve 5 installed on the drain valve cover 9. At this time, because the buoyancy generated by the float 4.12 is small and insufficient to overcome its own weight and the weight of the linkage mechanism 4.2, a water seal is formed within the system. The pump unit functional module 4 remains as follows... Figure 4 The exhaust state is shown as follows: the intake valve core 4.4 and the exhaust valve core 4.5 are in the lower position, the stainless steel ball descends to block the power air passage, and at the same time the gas in the pump is discharged from the exhaust port to the water collection tank through the side hole of the exhaust valve seat 4.6. Condensate can therefore continuously flow in.

[0037] As the water level rises, the buoyancy force on the float 4.12 gradually increases. The float 4.12 rises and pushes the valve stem 7.1, causing the opening of the main valve core 7.2 and the auxiliary valve core 7.5 to gradually increase, and the steam trap begins to perform the drainage action.

[0038] On the other hand, since the water level has not yet reached the critical switching point of the pump unit functional module 4 located at the third link 4.9 and the fourth link 4.8, the T-bar 4.7, the fourth link 4.8, and the fifth link remain stationary under the action of the spring 4.1. The pump unit maintains its original state, that is, the exhaust valve is open and the air intake valve assembly is closed.

[0039] When the steam system pressure is insufficient, the drain valve's draining capacity weakens. At this time, the water level in the pump chamber rises, and the float 4.12 rises accordingly, reaching and exceeding the critical switching action point of pump unit functional module 4. The inlet and outlet valve assembly then switches to the desired position under the action of the linkage mechanism 4.2. Figure 5 The air intake state is shown as follows: the exhaust valve core 4.5 is closed, the air intake valve core 4.4 is open, and the power steam enters the pump body 2 through the air intake valve assembly. The water inlet check valve 1 is closed, and the pump chamber pressure increases accordingly. The drain valve resumes its normal draining function. As the water level in the pump chamber decreases, the pump unit returns to its original state under the action of the linkage mechanism 4.2.

[0040] In summary, under normal pressure conditions, the steam trap independently performs its drainage function without the pump unit's involvement. Only when the pressure is insufficient and the water level in the pump chamber rises above the critical switching point will the pump unit start under the action of linkage mechanism 4.2 to provide power to the system and ensure the steam trap's normal drainage. Once the system pressure returns to normal, the pump unit automatically returns to its original state.

[0041] The large-capacity automatic steam trap pump described in the above embodiments is typically used for condensation of heat exchanger equipment, as well as other applications where steam system pressure fluctuates significantly and requires additional power for condensation. This device has the function of automatically adjusting the power supply and cut-off according to changes in steam system pressure: providing power when the system pressure is low and cutting off power when the required pressure is reached, thereby ensuring the safe and stable operation of the steam system's condensation function. The preferred embodiments of this utility model have been described in detail above.

[0042] It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A large-capacity automatic steam trap pump, characterized in that, include: The pump body has a pump cover on top and inlet and outlet ports on both sides. An inlet check valve is installed at the inlet port, and a valve cover is installed at the outlet port. An outlet check valve is installed behind the valve cover. A pump assembly functional module is installed on the pump cover. The pump assembly functional module includes an air intake and exhaust valve assembly, a float, and a linkage mechanism. The linkage mechanism is used to connect the float and the air intake and exhaust valve assembly. A drain valve is installed in the pump body corresponding to the outlet port. The drain valve is connected to the float. An exhaust valve is installed on the valve cover and is positioned higher than the drain valve.

2. The large-capacity automatic drain valve pump according to claim 1, characterized in that, The intake and exhaust valve assembly includes an intake valve assembly, an exhaust valve assembly, and a T-bar. The intake valve assembly includes an intake valve seat and an intake valve core. The exhaust valve assembly includes an exhaust valve seat and an exhaust valve core. The intake valve seat and the exhaust valve seat are fixed on the pump cover. The intake valve core and the exhaust valve core are respectively connected to both sides of the T-bar. The T-bar is connected to the linkage mechanism.

3. The large-capacity automatic steam trap pump according to claim 1, characterized in that, The drain valve is connected to the float via a linkage mechanism.

4. The large-capacity automatic drain valve pump according to claim 2, characterized in that, The linkage mechanism includes a fixed plate disposed inside the pump body and A first connecting rod, one end of which is pivotally connected to the fixed plate and the other end of which is connected to the float; The second link has one end pivotally connected to the middle of the first link and the other end extending upward; The third link, one end of which is pivotally connected to the top of the second link and the other end extends upward at an angle; The fourth link has one end pivotally connected to the top of the third link and the other end extending downward at an angle, and the middle part of the fourth link is pivotally connected to the fixed plate. The fifth link, one end of which is pivotally connected to the bottom end of the fourth link and the other end of which is connected to the T-shaped bar; The fixing plate is provided with a first limiting pin at the position corresponding to the first connecting rod. The first limiting pin is used to limit the downward movement of the end of the first connecting rod connected to the float. The fixing plate is provided with a second limiting pin at the position corresponding to the fourth link. The second limiting pin is used to limit the upward movement of the end of the fourth link connected to the third link. A spring is provided between the second link and the fourth link.

5. A large-capacity automatic drain valve pump according to claim 4, characterized in that, The steam trap includes a steam trap seat, a valve stem is provided on the steam trap seat, a main valve core and a secondary valve core are provided on the valve stem, and one end of the valve stem extends to the steam trap seat and is connected to the linkage mechanism.

6. A large-capacity automatic drain valve pump according to claim 4, characterized in that, The end of the first connecting rod that is pivotally connected to the fixed plate extends outward to form a power rod, and the power rod is pivotally connected to the valve stem through a movable pin.

7. A large-capacity automatic drain valve pump according to claim 5, characterized in that, The drain valve seat is provided with a guide structure one and a guide structure two. The main valve core is slidably disposed on the guide structure one, and the auxiliary valve core is slidably disposed on the guide structure two.

Images