Steam condensate water temperature control valve

Abstract

According to the steam condensate water temperature control valve, the lower end of a valve seat is connected to the inner end of an inlet channel, and the valve seat extends upwards from the bottom to form a blind hole channel; the valve element barrel is slidably arranged on the valve rod and downwards sleeves the upper end of the valve seat to form clearance fit, a working cavity is formed between the valve seat and the valve element barrel, and an overflow hole is formed in the top of the valve element barrel; according to the steam condensate water temperature control device, after the temperature of condensate water is increased, the expansion part is heated and expanded to press the valve element barrel to the lower end of the valve seat to form sealing, and small-flow overflow of the condensate water is completed only through the overflow hole; after the temperature of the condensate water is reduced, the expansion part is cooled and contracts, the valve element barrel is separated from the valve seat under the action of the spring, and the high-speed condensate water discharging process is completed; through rotation of the valve rod, the compression state of the spring is changed, the deformation difficulty of the expansion part is further improved, and the working temperature of the steam condensate water temperature control valve is adjusted. In the moving process of the valve element barrel, the ejector pin completes the cleaning process of the overflow hole at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve field especially relates to a steam condensate temperature control valve. BACKGROUND

[0002] In the prior art, the steam condensate temperature control valve is a device for adjusting and controlling the condensate temperature in the steam system, widely used in industrial thermal energy management, heating, ventilation and air conditioning, and steam power system fields. Steam will condense into liquid water after releasing heat, and this liquid is called condensate. Condensate usually has a high temperature and certain heat energy, so effective recovery and management are needed to improve energy utilization efficiency. In the chemical, food processing, textile and other industries, steam condensate temperature control valve is used to optimize the recovery and reuse of condensate, and reduce energy waste.

[0003] The temperature control valve is an automatic adjusting device that adjusts the valve opening to control the fluid flow by sensing the change of fluid temperature, so as to achieve accurate control of the target temperature. The temperature sensor detects the actual temperature of the condensate and transmits the signal to the controller. The controller calculates the valve opening adjustment according to the deviation between the set target temperature and the actual temperature. The actuator drives the valve opening and closing according to the controller's instruction, adjusts the flow of condensate, and achieves the purpose of temperature control. The use of electronic temperature sensor to realize temperature monitoring increases the complexity of the entire valve body, and also increases the difficulty of maintenance. It is difficult to realize the adjustment of working temperature by mechanical temperature sensing. SUMMARY

[0004] The main purpose of the utility model is to provide a steam condensate temperature control valve, which aims to solve the problem that the temperature control valve is difficult to realize the adjustment of working temperature by mechanical temperature sensing.

[0005] In order to achieve the above purpose, the utility model provides a steam condensate temperature control valve, which comprises:

[0006] The valve body is provided with an inlet channel and an outlet channel at the front end and the rear end respectively, and the inner ends of the inlet channel and the outlet channel are connected to the outer wall of the middle part of the valve body;

[0007] The valve cover is connected to the valve body to cover the inner ends of the inlet channel and the outlet channel;

[0008] The valve rod is installed on the valve cover;

[0009] The valve seat is connected to the inner end of the inlet channel, and the valve seat extends upward from the bottom to form a blind hole channel, at least one window is arranged on the upper end of the blind hole channel of the side wall of the valve seat, and a top rod is arranged on the top of the valve seat;

[0010] a compression nut connected to the lower end of the valve stem and threaded with the top rod;

[0011] a valve core barrel slidingly arranged on the valve stem and fitted on the upper end of the valve seat with a gap, the valve seat and the valve core barrel having a working cavity therebetween, the valve core barrel being provided with an overflow hole at the top thereof, wherein the valve seat is provided with a top pin at the top thereof corresponding to the overflow hole;

[0012] a spring having an upper end fitted on the outer periphery of the valve core barrel and a lower end supported on the lower end of the valve seat;

[0013] an expansion portion clamped between the compression nut and the valve core barrel, the expansion portion comprising a plurality of expansion metal rings fitted on the top rod, adjacent expansion metal rings being oppositely arranged;

[0014] wherein the expansion portion is heated and expanded to press the valve core barrel towards the lower end of the valve seat to form a seal, and the top pin extends into the overflow hole and is circumferentially fitted with a gap.

[0015] Further, when the valve core barrel is sealed with the valve seat, the top of the top pin is flush with the top of the overflow hole.

[0016] Further, when the valve core barrel is at the highest position, the top of the top pin is out of the overflow hole.

[0017] Further, the valve stem is provided with a fixing sleeve at the bottom thereof, the fixing sleeve being circumferentially clamped with the compression nut.

[0018] Further, a handle is detachably connected to the top of the valve stem.

[0019] Further, the top rod is welded or threaded with the valve seat.

[0020] Further, the number of windows is four and they are circumferentially spaced apart on the valve seat.

[0021] Further, the overflow hole is arranged to avoid the expansion portion.

[0022] Further, the expansion metal ring comprises two metal rings combined in the thickness direction and having different thermal expansion coefficients.

[0023] Further, the valve body and the valve cover are flange-connected or threaded.

[0024] The steam condensate temperature control valve provided by the utility model has the advantages that when the expansion part is not expanded, the condensate temperature is raised, the expansion part is heated and expanded to press the valve core barrel to the lower end of the valve seat to form a seal, at this time, the high-temperature condensate only completes the overflow of small flow through the overflow hole; when the condensate temperature is lowered, the expansion part is cooled and shrinks, the valve core barrel is separated from the valve seat under the action of the spring, and the process of discharging the condensate at high speed is completed; through the rotation of the valve rod, the compression state of the spring is changed, and then the deformation difficulty of the expansion part is also improved, and then the working temperature of the steam condensate temperature control valve is adjusted; in the process of movement of the valve core barrel, the top pin simultaneously completes the cleaning process of the overflow hole. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the steam condensate temperature control of the first embodiment of the utility model (low-temperature state);

[0026] Figure 2 is a schematic diagram of the valve seat in the steam condensate temperature control of the first embodiment of the utility model;

[0027] Figure 3 is a schematic diagram of the valve core barrel in the steam condensate temperature control of the first embodiment of the utility model;

[0028] Figure 4 is a schematic diagram of the steam condensate temperature control of the first embodiment of the utility model (high-temperature state).

[0029] Signs: 100-valve body, 110-inlet channel, 120-outlet channel, 200-valve cover, 300-valve rod, 310-fixing sleeve, 400-valve seat, 410-blind hole channel, 420-window, 430-top rod, 500-pressing nut, 600-valve core barrel, 610-working cavity, 620-overflow hole, 630-top pin, 700-spring, 800-expansion part. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are merely used to explain the utility model, and are not used to limit the utility model.

[0031] It will be understood by those within the art that, in this specification and in the claims, where a connection is made between elements, the connection can be direct or indirect. Such combinations, permutations, integers, offshoots, and variations of elements in the following claims are meant to be included herein. Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, many equivalents to the specific embodiments described herein. It is, therefore, to be understood that the application covers all such alternatives, modifications and equivalents. It is intended that the scope of the application should in no way be limited by the description of the embodiments set out above. The scope of the application is limited only by the claims.

[0032] Those skilled in the art will appreciate that unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0033] Reference Figures 1 to 4 In an embodiment of the present application, a steam condensate water temperature control valve comprises:

[0034] A valve body 100, a front end and a rear end are respectively provided with an inlet channel 110 and an outlet channel 120 which are both connected to the inner end of the valve body 100;

[0035] A valve cover 200, connected to the valve body 100, covers the inner end of the inlet channel 110 and the outlet channel 120;

[0036] A valve rod 300, installed on the valve cover 200;

[0037] A valve seat 400, the lower end is connected to the inner end of the inlet channel 110, the valve seat 400 extends upward from the bottom to have a blind hole channel 410, the sidewall of the valve seat 400 is provided with at least one window 420 corresponding to the upper end of the blind hole channel 410, and the top of the valve seat 400 extends upward to have a top rod 430;

[0038] A compression nut 500, connected to the lower end of the valve rod 300 and threaded with the top rod 430;

[0039] Valve core barrel 600, slidingly disposed on the valve stem 300 and downwardly sleeved on the upper end of the valve seat 400 to form a clearance fit, the valve seat 400 and the valve core barrel 600 have a working cavity 610, the valve core barrel 600 is provided with an overflow hole 620 at the top, wherein the valve seat 400 is provided with a top pin 630 at the top corresponding to the overflow hole 620;

[0040] Spring 700, the upper end is sleeved on the outer periphery of the valve core barrel 600, and the lower end is supported on the lower end of the valve seat 400;

[0041] Expansion part 800, clamped between the compression nut 500 and the valve core barrel 600, the expansion part 800 includes a plurality of expansion metal rings sleeved on the top rod 430, and adjacent expansion metal rings are reversely arranged;

[0042] Wherein, the expansion part 800 is heated and expanded to press the valve core barrel 600 to the lower end of the valve seat 400 to form a seal, the top pin 630 extends into the overflow hole 620 and is clearance fit in the circumferential direction.

[0043] In the prior art, the mechanical temperature control valve is difficult to achieve temperature adjustment.

[0044] The steam condensate temperature control valve provided by the utility model includes a valve body 100, a valve cover 200, a valve stem 300, a valve seat 400, a compression nut 500, a valve core barrel 600 and an expansion part 800.

[0045] The front end and the rear end of the valve body 100 are respectively provided with an inlet channel 110 and an outlet channel 120, both of which are led to the outer wall of the middle part of the valve body 100.

[0046] The valve cover 200 is connected to the valve body 100 and covers the inner ends of the inlet channel 110 and the outlet channel 120. The connection between the valve body 100 and the valve cover 200 can be flange connection or screw connection.

[0047] The valve stem 300 is installed up and down on the valve cover 200. The up-and-down mode of the valve stem 300 can be various, for example, the valve stem 300 is screw-connected to the valve cover 200. Specifically, the structure of the valve stem 300 is not the focus, and the existing conventional technology is referred to.

[0048] The lower end of the valve seat 400 is connected to the inner end of the inlet channel 110. The connection between the lower end of the valve seat 400 and the inlet channel 110 can be screw connection. The upper end of the valve seat 400 is smaller in diameter than the lower end. The valve seat 400 extends upward from the bottom and has a blind hole channel 410, which extends to the upper end of the valve seat 400 without penetrating through. The side wall of the valve seat 400 is provided with at least one window 420 corresponding to the upper end of the blind hole channel 410. The top of the valve seat 400 extends upward and has a top rod 430.

[0049] The clamping nut 500 is connected to the lower end of the valve stem 300. Specifically, the connection method between the clamping nut 500 and the valve stem 300 can be varied and self-limiting. The clamping nut 500 forms a threaded connection with the push rod 430, thereby enabling the clamping nut 500 to move up and down during rotation.

[0050] The valve core barrel 600 is slidably mounted on the valve stem 300 and sleeved downwards on the upper end of the valve seat 400. The inner circumference of the valve core barrel 600 is clearance-fitted with the outer circumference of the valve seat 400, allowing condensate flowing from the window 420 in the blind hole channel 410 to enter the gap between the valve core barrel 600 and the valve seat 400. A working chamber 610 is provided between the valve seat 400 and the valve core barrel 600. An overflow hole 620 is provided at the top of the valve core barrel 600. A ejector pin 630 is provided at the top of the valve seat 400 corresponding to the overflow hole 620.

[0051] The upper end of the spring 700 is sleeved on the outer periphery of the valve core barrel 600, while the lower end is supported on the lower end of the valve seat 400. The spring 700 supports the valve core barrel 600 on the valve seat 400.

[0052] The expansion section 800 is clamped between the clamping nut 500 and the valve core barrel 600. The expansion section 800 includes multiple expansion metal rings sleeved on the push rod 430. The length direction of the expansion section 800 is aligned with the thickness direction of the expansion metal rings. Adjacent expansion metal rings are arranged in opposite directions, so that when the multiple expansion metal rings expand due to heat, they can produce greater deformation in the thickness direction. For example, the expansion metal rings include two metal rings joined together in the thickness direction with different coefficients of thermal expansion. One metal ring acts as the active layer and can be an alloy containing manganese, nickel, and copper, while the other metal ring acts as the passive layer and can be an iron alloy containing 36%-42% nickel. The two are joined together by cold rolling, melting, or hot rolling processes. The expansion section 800 can respond to temperature, thereby achieving dimensional changes in the length direction.

[0053] The expansion section 800 expands due to heat, pressing the valve core barrel 600 against the lower end of the valve seat 400 to form a seal. A working chamber 610 exists between the valve seat 400 and the valve core barrel 600. The working chamber 610 remains in both the highest and lowest positions of the valve core barrel 600, only its dimensions change.

[0054] In the working process, when the expansion part 800 is not heated and expanded, the valve seat 400 and the valve core barrel 600 are not sealed, the condensed water flows into the valve seat 400 from the inlet channel 110, and the condensed water flows out through the blind hole channel 410 and flows into the valve cover 200 through the gap between the valve core barrel 600 and the valve seat 400; part of the condensed water flows into the valve cover 200 through the overflow hole 620 of the valve core barrel 600. When the temperature of the condensed water rises, the expansion part 800 is heated and expanded, the valve core barrel 600 is pressed towards the lower end of the valve seat 400 to form a seal, the ejector pin 630 extends into the overflow hole 620 and is in a clearance fit in the circumferential direction, and at this time the high-temperature condensed water only completes the overflow of small flow through the overflow hole 620. The ejector pin 630 simultaneously completes the cleaning process (blockage, etc.) of the overflow hole 620. When the temperature of the condensed water drops, the expansion part 800 shrinks, the valve core barrel 600 separates from the valve seat 400 under the action of the spring, and the process of discharging the condensed water at high speed is completed. Through the rotation of the valve rod 300, the rising and falling of the compression nut 500 are driven, the positions of the expansion part 800 and the valve core barrel 600 change, the compression state of the spring 700 changes, and then the deformation difficulty of the expansion part 800 is also improved, and then the working temperature of the steam condensed water temperature control valve is adjusted.

[0055] In summary, when the expansion part 800 is not expanded, when the temperature of the condensed water rises, the expansion part 800 is heated and expanded to press the valve core barrel 600 towards the lower end of the valve seat 400 to form a seal, and at this time the high-temperature condensed water only completes the overflow of small flow through the overflow hole 620; when the temperature of the condensed water drops, the expansion part 800 cools and shrinks, the valve core barrel 600 separates from the valve seat 400 under the action of the spring, and the process of discharging the condensed water at high speed is completed; through the rotation of the valve rod 300, the compression state of the spring 700 changes, and then the deformation difficulty of the expansion part 800 is also improved, and then the working temperature of the steam condensed water temperature control valve is adjusted; during the movement of the valve core barrel 600, the ejector pin 630 simultaneously completes the cleaning process (blockage, etc.) of the overflow hole 620.

[0056] In one embodiment, when the valve core barrel 600 is sealed with the valve seat 400, the top of the ejector pin 630 is flush with the top of the overflow hole 620.

[0057] In this embodiment, the length of the ejector pin 630 is limited, which can complete efficient cleaning while avoiding the action of the ejector pin 630 with the expansion part 800.

[0058] In one embodiment, when the valve core barrel 600 is in the highest position, the top of the ejector pin 630 is out of the overflow hole 620.

[0059] In this embodiment, the length of the ejector pin 630 is limited, which improves the working effect of the ejector pin 630.

[0060] Reference Figure 1In one embodiment, the bottom of the valve rod 300 is provided with a fixing sleeve 310, which is clamped with the compression nut 500 in the circumferential direction.

[0061] In the present embodiment, the connection mode of the compression nut 500 and the valve rod 300 is limited, for example, the inner section of the fixing sleeve 310 is square, and the section of the compression nut 500 is a square matching the fixing sleeve 310, so that the valve rod 300 can drive the compression nut 500 to rotate.

[0062] In one embodiment, the top of the valve rod 300 is detachably connected with a handle.

[0063] In the present embodiment, the handle is convenient for lifting the valve rod 300, and can be detached when the temperature does not need to be adjusted.

[0064] In one embodiment, the top rod 430 is welded or threadedly connected to the valve seat 400.

[0065] In the present embodiment, the connection mode of the top rod 430 is limited, so that the overall processing difficulty is reduced, and the processing of the long strip-shaped member is avoided.

[0066] In one embodiment, the number of windows 420 is four and is arranged in the circumferential direction of the valve seat 400.

[0067] In the present embodiment, the number of windows 420 is limited, so that the condensed water flows through the valve seat 400 easily, and the structural strength of the valve seat 400 is maintained.

[0068] In one embodiment, the overflow hole 620 is arranged to avoid the expansion part 800.

[0069] In the present embodiment, the position of the overflow hole 620 and the expansion part 800 is limited, so that the overflow hole 620 is not accidentally blocked.

[0070] In one embodiment, the expansion metal ring includes two metal rings combined in the thickness direction and having different thermal expansion coefficients.

[0071] In the present embodiment, one metal ring as an active layer can be an alloy containing manganese, nickel and copper, and the other metal ring as a passive layer can be an iron alloy containing 36%-42% nickel, and the two are combined by cold rolling, melting or hot rolling process.

[0072] In one embodiment, the valve body 100 and the valve cover 200 are flange-connected or threadedly connected.

[0073] In the present embodiment, two fixing modes of the valve cover 200 are provided, which have the advantages of maturity and stability.

[0074] In summary, the steam condensate temperature control provided by the utility model, when the expansion part 800 is not expanded, the condensate temperature is raised, the expansion part 800 is heated and expanded to press the valve core barrel 600 to the lower end of the valve seat 400 to form a seal, at this time, the high-temperature condensate only completes the overflow of small flow through the overflow hole 620; when the condensate temperature drops, the expansion part 800 cools and shrinks, the valve core barrel 600 separates from the valve seat 400 under the action of the spring, and the high-speed discharge of the condensate is completed; through the rotation of the valve rod 300, the compression state of the spring 700 changes, and then the deformation difficulty of the expansion part 800 is also improved, and then the working temperature of the steam condensate temperature control valve is adjusted; in the process of the movement of the valve core barrel 600, the ejector pin 630 simultaneously completes the cleaning process of the overflow hole 620.

[0075] The above only describes the preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A steam condensate temperature control valve characterized by, The utility model relates to a valve, including: a valve body, a front end and a rear end are provided with an inlet channel and an outlet channel respectively, and the inner ends of the inlet channel and the outlet channel are communicated with the outer wall of the middle part of the valve body; a valve cover, connected to the valve body, covers the inner ends of the inlet channel and the outlet channel; a valve stem, installed in the valve cover in a lifting manner; a valve seat, the lower end of which is connected to the inner end of the inlet channel, the valve seat extends upward from the bottom to form a blind hole channel, at least one window is arranged on the side wall of the valve seat corresponding to the upper end of the blind hole channel, and a top rod extends upward from the top of the valve seat; a compression nut, connected to the lower end of the valve stem and threaded with the top rod; a valve core barrel, slidingly arranged on the valve stem and gap-fitted on the upper end of the valve seat, the valve seat and the valve core barrel have a working cavity therebetween, and an overflow hole is arranged on the top of the valve core barrel, wherein the valve seat is provided with a top pin corresponding to the overflow hole on the top thereof; a spring, the upper end of which is sleeved on the outer periphery of the valve core barrel, and the lower end of which is supported on the lower end of the valve seat; an expansion part, clamped between the compression nut and the valve core barrel, the expansion part includes a plurality of expansion metal rings sleeved on the top rod, and adjacent expansion metal rings are arranged in opposite directions; wherein the expansion part is heated and expanded to press the valve core barrel towards the lower end of the valve seat to form a seal, and the top pin extends into the overflow hole and is gap-fitted in the circumferential direction.

2. The steam condensate water temperature control valve of claim 1, wherein, When the valve core barrel and the valve seat form a seal, the top of the top pin is flush with the top of the overflow hole.

3. The steam condensate water temperature control valve of claim 2, wherein, When the valve core barrel is in the highest position, the top of the top pin is out of the overflow hole.

4. The steam condensate water temperature control valve of claim 1, wherein, The bottom of the valve stem is provided with a fixing sleeve, and the fixing sleeve is clamped in the circumferential direction with the compression nut.

5. The steam condensate water temperature control valve of claim 1, wherein, A handle can be detachably connected to the top of the valve stem.

6. The steam condensate water temperature control valve according to any one of claims 1 to 5, characterized in that, The top rod is welded or threaded to the valve seat.

7. The steam condensate water temperature control valve according to any one of claims 1 to 5, characterized in that, The number of windows is four and is arranged in the circumferential direction of the valve seat.

8. The steam condensate water temperature control valve according to any one of claims 1 to 5, characterized in that, The overflow hole avoids the expansion part.

9. The steam condensate water temperature control valve according to any one of claims 1 to 5, wherein The expansion metal ring includes two metal rings combined in the thickness direction and having different thermal expansion coefficients.

10. The steam condensate water temperature control valve according to any one of claims 1 to 5, characterized in that, The valve body and the valve cover are flange-connected or threaded.

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