Adjustable Flow Dynamic Constant Temperature Radiator Valve

Abstract

The present invention relates to a dynamic thermostatic thermostatic valve with adjustable flow, wherein a valve body is provided with a medium inlet and a medium outlet, a horizontally arranged valve seat support is provided in the valve body, and a valve cavity in the valve body is divided into an upper cavity and a lower cavity, the valve seat support is provided with a central through hole for connecting the upper cavity and the lower cavity, the lower cavity is connected to the medium inlet, the upper cavity is connected to the medium outlet, a valve core assembly for adjusting the valve medium flow is provided in the upper cavity, a dynamic regulating core whose resistance changes with the pressure difference is provided in the lower cavity, the dynamic regulating core is provided with a regulating core inlet and a regulating core outlet, and a medium channel connecting the regulating core inlet and the regulating core outlet, the regulating core inlet is connected to the lower cavity, and the regulating core outlet is connected to the central through hole. The present invention can not only adjust the medium flow of the valve, but also basically maintain the stability of the medium flow when the pressure difference between the inlet and outlet ends of the valve changes.

Description

Technical Field

[0001] The invention relates to a constant-temperature warm air valve with adjustable flow rate, belonging to the technical field of valves. Background Art

[0002] A traditional heating valve includes a valve body, which is provided with a valve cavity connecting the inlet and outlet at both ends, and a valve seat is provided in the valve cavity. The valve seat is usually arranged horizontally, and its central through hole constitutes the necessary passage for the medium. A valve disc is provided above the valve seat, and the valve disc and the valve seat constitute a valve sealing pair. The valve disc is connected to a valve stem, which is driven by the valve stem to move it up and down to realize the opening, closing and adjustment of the valve opening. For heating systems or other domestic water systems, the valve disc is usually composed of a hard valve disc seat and a rubber sealing gasket embedded in the valve disc seat, or only of a rubber sealing gasket. When the rubber sealing gasket contacts and presses the sealing surface of the valve seat, the valve is closed. When the rubber sealing gasket is away from the valve seat, the medium is able to pass through the gap between the valve seat and the rubber sealing gasket, and the valve is opened. The distance between the valve seat sealing surface and the rubber sealing gasket reflects the opening of the valve, determines the flow area and resistance at the sealing pair, and thus affects the flow rate of the valve.

[0003] This valve is used in the various heating medium pipes of the heating system, and the flow rate can be regulated by adjusting the valve opening. By setting the valve opening, the flow rate in the heating medium pipe in which it is located is basically constant (when the pressure difference between the inlet and outlet of the valve does not change), and the room temperature of the rooms or houses to which each heating medium pipe leads is basically consistent (the valve opening on the heating medium pipe at the front end of the heating system can be set to be smaller than the valve opening on the heating medium pipe at the back end of the heating system). However, the medium flow rate not only changes with the change of valve opening, but is also affected by the medium pressure or the pressure difference between the inlet and outlet of the valve. When the pressure at the inlet of the valve increases, the flow rate of the valve will increase at the same valve opening, and when the pressure at the inlet of the valve decreases, the flow rate of the valve will decrease at the same valve opening. Specifically in the heating system, this will lead to changes in the heating capacity, and because the front-end pipeline pressure in the heating system is usually greater than the rear-end pipeline pressure, when the heating medium pressure of the heating system changes, the pressure changes on each heating medium pipeline are inconsistent, resulting in inconsistent changes in the heating capacity of each heating medium pipeline, affecting the room temperature of the rooms or residences to which each heating medium pipeline leads to maintain a consistent heating effect (the room temperature at the front end of the heating system is high, and the room temperature at the rear end is low).

[0004] In addition, this type of valve uses the valve stem to drive the valve disc to move up and down to achieve the opening, closing and opening adjustment of the valve. During the process of opening, closing and opening adjustment of the valve, the valve stem needs to move axially and rotate relative to the valve body (two modes of movement at the same time), which places very high requirements on the sealing of the valve stem on the valve body and the process processing of related components. In actual application, it is very easy for the related seals to fail or be damaged due to the frequent movement of the valve stem relative to the valve body, resulting in valve leakage or malfunction. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an adjustable flow dynamic thermostatic warm air valve, which can not only adjust the medium flow of the valve, but also basically maintain the stability of the medium flow when the pressure difference between the inlet and outlet ends of the valve changes.

[0006] The technical solution of the present invention to achieve the above-mentioned purpose is: an adjustable flow dynamic thermostatic air valve, including a valve body, a medium inlet (or inlet cavity) and a medium outlet (or outlet cavity) are provided on the valve body, a valve seat support is provided in the valve body, the valve seat support is arranged horizontally, and the valve cavity in the valve body is divided into an upper cavity and a lower cavity, the valve seat support is provided with a central through hole for connecting the upper cavity and the lower cavity, the lower cavity is connected with the medium inlet, a valve core and a valve core sleeve are provided in the upper cavity, the valve core sleeve is fixedly sealed with the inner wall of the upper cavity, an annular gap is left between the outer wall of its lower part and the inner wall of the upper cavity, the annular gap is connected with the medium outlet, the bottom end of the valve core sleeve is sealed with the valve seat support, the valve core sleeve is provided with a valve core sleeve outlet connected with the annular gap, the valve The core is coaxially arranged in the valve core sleeve and rotates and seals with the valve core sleeve. The bottom end of the valve core is sealed with the valve seat support. The bottom of the valve core is provided with a valve core cavity connected to the central through hole. The valve core is provided with a valve core outlet for connecting the valve core cavity and the valve core sleeve outlet. The upper and lower widths of the valve core outlet gradually change along the circumference of the valve core. The top end of the valve core sleeve is provided with an adjusting member connected to the valve core, and the adjusting member rotates with the inner wall of the valve core sleeve. A dynamic adjusting core whose resistance changes with the pressure difference is provided in the lower cavity. The dynamic adjusting core is provided with an adjusting core inlet and an adjusting core outlet and a medium channel connecting the adjusting core inlet and the adjusting core outlet. The adjusting core inlet is connected to the lower cavity, and the adjusting core outlet is connected to the central through hole.

[0007] Preferably, the dynamic adjustment core includes a cylindrical shell, the shell is provided with a top cover, the shell is fixedly connected in the lower cavity and sealed between the valve seat support, the adjustment core inlet is provided on the side wall of the shell, the adjustment core outlet is provided on the top cover, the top cover constitutes a valve seat, and a floating cylinder that can move up and down is provided in the shell, the height of the floating cylinder is smaller than the height of the shell, and a gap is left between the outer wall of the floating cylinder and the inner wall of the shell.

[0008] Preferably, the bottom end of the floating cylinder is closed and the top end is open, and a floating cylinder inlet is provided on the side wall. A coil spring and a spring top cap are provided in the floating cylinder. The bottom end of the coil spring abuts against or is fixedly connected to the bottom wall of the floating cylinder, and the top end of the coil spring abuts against or is fixedly connected to the spring top cap. A gap is left between the side wall of the spring top cap (referring to the radial outer edge of the spring top cap) and the inner wall of the floating cylinder.

[0009] Preferably, there are multiple floating cylinder inlets, and the multiple floating cylinder inlets are evenly distributed along the circumferential direction on the side wall of the floating cylinder.

[0010] Preferably, the bottom wall inside the floating cylinder and the bottom wall of the spring top cap are provided with protrusions extending outward and matching the inner diameter of the coil spring. The two ends of the coil spring are respectively mounted on the protrusions on the corresponding sides. The protrusions can be cylindrical or conical.

[0011] Preferably, a guide hole is provided on the top wall of the spring top cap, and the guide hole is a blind hole (a hole that does not pass through the spring top cap). A guide column extending downward is provided in the center of the top cover, and the guide column is inserted into the guide hole.

[0012] Preferably, the regulating core outlet is a circular opening located at the center of the top cover, and the diameter of the regulating core outlet is not less than the outer diameter of the floating cylinder.

[0013] A bracket can be provided in the outlet of the regulating core, the guide column is fixed on the bracket, and the bracket can be a cross bracket.

[0014] Preferably, an annular flange protruding radially outward is provided on the outer wall of the bottom end of the floating cylinder, and a gap is left between the outer edge of the annular flange and the inner wall of the shell, and the gap between the outer edge of the annular flange and the inner wall of the shell is smaller than the gap between the outer wall of the main body of the floating cylinder and the inner wall of the shell. The gap between the outer edge of the annular flange and the inner wall of the shell is a small gap, usually not exceeding 0.5 cm.

[0015] Preferably, the top cover is provided with a boss extending downward and inserted into the shell, the boss is cylindrical, the outer wall of which is sealed with the inner wall of the shell, and the inner wall of which is a conical surface with the inner diameter gradually expanding from top to bottom. The minimum inner diameter of the boss is not less than the outer diameter of the floating cylinder. When the bottom wall of the floating cylinder is in contact with the bottom wall inside the shell (that is, when the floating cylinder is located at the bottom inside the shell), the top end of the floating cylinder is located above the bottom end of the boss.

[0016] Preferably, the top end of the housing and the top end of the top cover are both provided with radially outwardly projecting flanges. The housing and the top cover are assembled within the lower chamber by inserting the housing from the upper chamber into the lower chamber, with the flange at the top end of the housing overlapping the top surface of the valve seat support. The boss of the top cover is inserted into the housing from top to bottom, with the flange at the top end of the top cover overlapping the top surface of the flange at the top end of the housing, or overlapping the valve seat support, or overlapping the top surface of the flange at the top end of the housing and the valve seat support. The bottom ends of the valve core housing and the valve core both abut against the top surface of the flange at the top end of the top cover, and the valve seat support is provided with a tongue-and-groove or stepped surface suitable for overlapping the flange at the top end of the housing. The valve seat (the top cover) and the valve seat support may be provided as an integral structure.

[0017] Preferably, the valve core housing outlet is a rectangular opening, the valve core housing outlet corresponds laterally (or horizontally) to the annular gap, and the vertical width of the valve core housing outlet is no greater than (preferably less than) the vertical width of the annular gap. The valve core outlet corresponds laterally (or horizontally) to the valve core housing outlet, and the maximum vertical width of the valve core outlet is less than the vertical width of the valve core housing outlet.

[0018] The lowest point of the lower edge of the valve core outlet is flush with the lower edge of the valve core housing outlet, or the highest point of the upper edge of the valve core outlet is flush with the upper edge of the valve core housing outlet, or the highest point of the upper edge of the valve core outlet is lower than the upper edge of the valve core housing outlet, and the lowest point of the lower edge of the valve core outlet is higher than the lower edge of the valve core housing outlet.

[0019] The upper and lower widths of the valve core outlet can change linearly, that is, the upper and lower edges of the valve core outlet are oblique straight edges or arc-shaped edges, or the upper and lower edges of the valve core outlet are a combination of oblique straight edges or arc-shaped edges and straight edges. The upper and lower widths of the valve core outlet can also change in a step-like manner, that is, the upper and lower edges of the valve core outlet are step-shaped edges, or the upper and lower edges of the valve core outlet are a combination of step-shaped edges and oblique straight edges or arc-shaped edges.

[0020] Preferably, the maximum flow area of the valve core outlet communicating with the valve core housing outlet is smaller than the flow area of the regulating core outlet communicating with the valve core cavity.

[0021] Preferably, a valve flap is provided in the valve core cavity, the valve flap is installed at the lower end of the valve stem, the valve core is provided with an axial hole, the valve stem is coaxially located in the axial hole of the valve core, the top end of the valve stem is located outside the valve body (extending upward outside the valve body), and the valve flap and the valve seat (referring to the top cover) constitute the main sealing pair (opening and closing sealing pair) of the valve.

[0022] The valve disc can be composed of a hard valve disc seat and a rubber sealing gasket embedded in the valve disc seat, or it can be composed of only a rubber sealing gasket. The valve disc and the regulating core outlet on the top cover form a sealing pair for opening and closing the valve. To facilitate the sealing between the valve disc and the regulating core outlet, the top wall of the top cover can be provided with a tapered surface with an inner diameter that gradually decreases from top to bottom.

[0023] Preferably, a spring is sleeved on the valve stem, and the spring is located in the axial hole of the valve core. The bottom end of the axial hole of the valve core is provided with an annular flange extending inward, and the valve stem and the inner wall of the annular flange are slidingly sealed. A retaining ring (or a retaining ring) is fixedly provided in the middle of the valve stem, and the bottom end of the spring rests on the annular flange, and the top end of the spring rests on the retaining spring.

[0024] Preferably, a radially inward annular groove is provided in the middle of the valve stem, the retaining ring is horizontally embedded in the annular groove, and the outer edge of the retaining ring protrudes from the outer wall of the valve stem.

[0025] Preferably, a cylindrical spring sleeve and a clamping cap are provided in the axial hole of the valve core, the clamping cap is located above the spring sleeve, the spring and the retaining ring are located in the spring sleeve, the top end of the spring sleeve is provided with an inwardly protruding annular flange, the bottom end of the spring sleeve rests on the inwardly protruding annular flange at the bottom end of the axial hole of the valve core, the clamping cap is fixedly connected (for example, threadedly connected) to the top end of the axial hole of the valve core, the bottom end of the clamping cap rests on the spring sleeve, and the top end of the clamping cap rests on the adjusting member or leaves a gap between it and the adjusting member.

[0026] Preferably, the adjusting member is in the shape of an inverted cup, and the adjusting member and the valve core can be connected by a threaded connection or a clamping connection. For example, the bottom end of the adjusting member is provided with a flange protruding inward (usually an annular flange), and the top end of the valve core is provided with a groove (usually an annular groove) matching the flange. The flange on the adjusting member is clamped in the groove on the valve core, and a number of inward-protruding protrusions are distributed circumferentially on the inner wall of the adjusting member. The top end of the valve core is provided with a clamping groove matching the number and position of the protrusions, and each protrusion on the adjusting member is respectively clamped in the corresponding clamping groove.

[0027] Preferably, the top end of the regulating member is located outside the valve body.

[0028] Preferably, a protective cap is provided at the top of the valve body, the protective cap is in the shape of an inverted cup, the protective cap is threadedly connected to the valve body, the top of the valve stem rests on the top wall inside the protective cap, and a matching clip structure is provided on the outer wall of the top of the protective cap and on the adjusting member.

[0029] Preferably, a circular groove is provided in the center of the outer wall at the top end of the protective cap, and a plurality of inwardly protruding protrusions are provided on the groove wall of the circular groove along the circumferential direction, and a card groove corresponding to the number and position of the protrusions is provided on the axial outer wall of the adjusting member. When the protective cap is unscrewed from the valve body, the protective cap can be turned over so that the protrusions on it are stuck in the corresponding card grooves on the adjusting member. The protective cap can be rotated to drive the valve core to rotate in the valve core sleeve through the adjusting member.

[0030] The center of the circular groove may be provided with a blind hole for the top end of the valve stem to be inserted into. The top wall inside the protective cap may also be provided with a blind hole for the top end of the valve stem to be inserted into.

[0031] A flow scale may be provided on the side wall of the protective cap along the circumferential direction. When the protective cap is reversed and engaged with the adjusting member, the flow scale corresponds to different upper and lower width positions of the valve core outlet. The corresponding relationship between the flow scale and different upper and lower width positions of the valve core outlet can be ensured by setting the protrusions (and corresponding slots) on the protective cap to different widths or setting different spacings between adjacent protrusions (and corresponding slots) after the protective cap (after being reversed) is engaged with the adjusting member.

[0032] A temperature bulb may be fixedly arranged in the protective cap. When the protective cap is mounted on the valve body in a forward direction, the top end of the valve stem abuts against the temperature bulb.

[0033] The beneficial effects of the present invention are:

[0034] (1) Since the dynamic adjustment core is provided in the lower cavity, when the pressure difference between the medium inlet and the medium outlet of the valve becomes larger, the pressure of the medium flowing into the lower part of the floating cylinder through the gap between the shell of the dynamic adjustment core and the floating cylinder will become relatively larger, pushing the floating cylinder to float up in the shell of the dynamic adjustment core (compressing the coil spring while floating up), so that the flow area between the floating cylinder and the outlet of the adjustment core is reduced, and the medium flow rate is reduced. When the pressure difference between the medium inlet and the outlet of the valve becomes smaller, the pressure of the medium flowing into the lower part of the floating cylinder is relatively smaller, and the floating cylinder sinks under the downward thrust of the coil spring and the action of gravity, so that the flow area between the floating cylinder and the outlet of the adjustment core is increased, and the medium flow rate is increased, which basically avoids the change of the medium flow rate or heating amount caused by the change of the pressure difference between the medium inlet and the outlet of the valve, which is conducive to maintaining the stability of the medium flow rate. The flow error range can be controlled within ±5%, keeping the room temperature basically constant. When used in a heating system, the pressure in the front-end pipe is usually higher, and the pressure in the rear-end pipe is usually lower. The floating cylinder in the valve on the front-end pipe floats up, reducing the medium flow, and the floating cylinder in the valve on the rear-end pipe sinks, increasing the medium flow. Combined with the set opening (set flow) of the valves on each pipe, it can ensure that the heating amount to the rooms or residences to which each pipe leads is basically the same, and that the room temperature in the rooms or residences to which each pipe leads is basically the same.

[0035] (2) Since the flow rate of the valve is adjusted by rotating the valve core to change the flow area between the valve core outlet and the valve core housing outlet, and the flow area between the valve core outlet and the valve core housing outlet is a plane (equivalent to a plane), compared with the traditional heating valve that adjusts the flow rate of the valve by changing the distance between the valve disc and the valve seat (the flow area is an annular surface), the flow rate adjustment of the valve is more precise.

[0036] (3) Since the opening and closing of the valve and the flow regulation are controlled by different components respectively (the opening and closing of the valve is controlled by the valve stem, and the flow regulation is controlled by the valve core), and when controlling the opening and closing of the valve and the flow regulation, the relevant components only make a single movement (the valve stem only makes axial movement when the valve is opened and closed, and the valve core only rotates relative to the valve core sleeve when regulating the flow), compared with the traditional heating valve, the valve stem moves both axially and rotates when opening and closing and regulating the flow (two movements are performed at the same time), the movement form of the relevant components is single, and it is not easy to leak or malfunction, which can effectively extend the service life of the valve, and can appropriately reduce the sealing requirements and process requirements for the relevant components, thereby reducing production costs.

[0037] (4) Due to the internal and external structural settings of the protective cap, when the protective cap is installed on the valve body (threaded on the valve body), the valve can be opened and closed. When the protective cap is installed on the regulating member in reverse (clamped on the regulating member), the flow rate of the valve can be adjusted, which is convenient for the use and control of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a structural schematic diagram of a working mode of the present invention (the protective cap is mounted on the valve body);

[0039] Figure 2 is a structural schematic diagram of another working mode of the present invention (the protective cap is reversely installed on the adjusting member);

[0040] Figure 3 It is an assembly schematic diagram (exploded view) of the present invention;

[0041] Figure 4 It is a structural schematic diagram of the valve core housing of the present invention;

[0042] Figure 5 It is a structural schematic diagram of the valve core of the present invention;

[0043] Figure 6 is a schematic structural diagram of the dynamic adjustment core of the present invention;

[0044] Figure 7 1 is an assembly diagram (exploded view) of the dynamic adjustment core of the present invention. Implementation Method

[0045] All directional indications (such as up, down, top, bottom, inside, outside, etc.) in the embodiments of the present invention are only used to explain the relative position relationship and movement of the various components in a specific posture (as shown in the accompanying drawings) and do not constitute a limitation on the actual use direction. If the specific posture changes, the directional indication will also change accordingly.

[0046] See also Figure 1-7The present invention discloses an adjustable flow dynamic thermostatic air valve, comprising a valve body 1, the valve body being provided with a medium inlet (or inlet cavity) 2 and a medium outlet (or outlet cavity) 3, the valve body being provided with a valve seat support (or valve seat bracket) 4, the valve seat support being arranged horizontally, dividing a valve cavity in the valve body into an upper cavity and a lower cavity, the valve seat support being provided with a central through hole for connecting the upper cavity and the lower cavity, the lower cavity being connected to the medium inlet, and the upper cavity being connected to the medium outlet, forming a medium channel in the valve body consisting of the medium inlet, the lower cavity, the upper cavity, and the medium outlet. The upper cavity is provided with a coaxially sleeved valve core 5 and a valve core sleeve 6, the valve core sleeve is fixedly sealed to the inner wall of the upper cavity (for example, a threaded connection and provided with a suitable sealing ring), an annular gap (or annular cavity) is left between the outer wall of its lower part and the inner wall of the upper cavity, the annular gap is communicated with the medium outlet, the bottom end of the valve core sleeve is sealed with the valve seat support, a valve core sleeve outlet 7 communicated with the annular gap is provided on the valve core sleeve, the valve core sleeve outlet is communicated with the medium outlet through the annular gap, and is used for the medium to flow out of the valve body, the valve core is coaxially arranged in the valve core sleeve, and rotates and seals with the valve core sleeve (provided with a suitable sealing ring), so that the The valve core can rotate coaxially relative to the valve core housing. The bottom end of the valve core is sealed between the valve seat support. The bottom of the valve core is provided with a valve core cavity 8 connected to the central through hole, so that the medium can flow into the valve core cavity through the central through hole. The valve core is provided with a valve core outlet 9 for connecting the valve core cavity with the valve core housing outlet, so that the medium entering the valve core cavity can flow into the medium outlet through the connected valve core outlet and the valve core housing outlet, and finally flow out of the valve body. The upper and lower widths of the valve core outlet gradually change along the circumference of the valve core, so that when the valve core is rotated, the flow area of the valve core outlet connected to the valve core housing outlet can be changed, thereby adjusting the flow rate of the valve. The top end of the valve core housing is provided with an adjusting member 10 connected to the valve core. The adjusting member is rotatably engaged with the inner wall of the valve core housing, so that the adjusting member can rotate relative to the valve core housing and drive the valve core to rotate together, thereby adjusting the flow rate of the valve.

[0047] The lower cavity is provided with a dynamic adjustment core 11 whose resistance (resistance to medium flow) changes with the pressure difference. The dynamic adjustment core is provided with an adjustment core inlet and an adjustment core outlet and a medium channel connecting the adjustment core inlet and the adjustment core outlet. The adjustment core inlet is connected to the lower cavity (or can be directly connected to the medium inlet), and the adjustment core outlet is connected to the central through hole. Therefore, the medium channel of the dynamic adjustment core constitutes a necessary medium channel connecting the medium inlet and the central through hole. When the pressure difference between the medium inlet and the medium outlet changes, the resistance of the dynamic adjustment core changes in the opposite direction synchronously and the change amplitude is appropriate, so that the medium flow rate flowing through the dynamic adjustment core can be adjusted, thereby maintaining the stability of the medium flow rate.

[0048] The dynamic regulating core preferably comprises a cylindrical housing 12 with a top cover 13. The housing is fixedly attached to the lower chamber and sealed against the valve seat support. The housing can be fixedly attached to the valve seat support, and a gap can be left between its outer wall and the wall of the lower chamber. The regulating core inlet is located on the side wall of the housing, generally corresponding to the medium inlet, to facilitate the flow of medium into the housing. The regulating core outlet 14 is located on the top cover, which forms the valve seat. A floating cylinder 15 is disposed within the housing, capable of vertical movement. The height of the floating cylinder is smaller than that of the housing, enabling it to move up and down within the housing. A gap is left between the outer wall of the floating cylinder and the inner wall of the housing to facilitate the flow of medium. The bottom surface of the floating cylinder can be provided with a plurality of downwardly extending legs. When the floating cylinder is at the bottom of the housing (when it is moved downward to its lowest position), a gap is left between its bottom wall and the bottom wall of the housing, facilitating the flow of medium below the floating cylinder.

[0049] The floating cylinder is closed at its bottom and open at its top. Its sidewall is provided with a floating cylinder inlet 16 for medium to flow into the floating cylinder and out of its top. Multiple floating cylinder inlets can be provided, evenly distributed circumferentially along the sidewall of the floating cylinder. A coil spring 17 and a spring cap 18 are preferably provided within the floating cylinder. The bottom end of the coil spring abuts or is fixedly attached to the bottom wall of the floating cylinder, while the top end of the coil spring abuts or is fixedly attached to the spring cap. Depending on control requirements, the coil spring may or may not be pre-compressed. When the floating cylinder moves upward and compresses the coil spring, the coil spring applies a downward thrust to the bottom wall of the floating cylinder. A gap is provided between the sidewall of the spring cap (referring to the radial outer edge of the spring cap) and the inner wall of the floating cylinder to facilitate medium flow.

[0050] The bottom wall of the floating cylinder and the bottom wall of the spring cap are preferably both provided with outwardly extending protrusions that mate with the inner diameter of the coil spring. The two ends of the coil spring are respectively sleeved onto the protrusions on the corresponding sides to position the coil spring and prevent lateral bending. The protrusions can be cylindrical or frustoconical in shape.

[0051] The top wall of the spring cap preferably includes a guide hole, which is a blind hole (not extending through the spring cap). Accordingly, a downwardly extending guide post is provided in the center of the top cover and inserted into the guide hole to guide and position the spring cap. When the bottom of the floating cylinder is located within the housing and has not moved upward, the bottom end of the guide post abuts the bottom of the guide hole, or a gap is left between the bottom end of the guide post and the bottom of the guide hole.

[0052] The regulating core outlet is preferably a circular opening located in the center of the top cover. The diameter of the regulating core outlet is no less than the outer diameter of the floating cylinder and smaller than the diameter of the central through hole. A bracket can be provided within the regulating core outlet, and the guide post can be secured to the bracket. The bracket can be a cross bracket.

[0053] The outer wall of the bottom end of the floating cylinder preferably includes a radially outwardly projecting annular flange. A gap is formed between the outer edge of the annular flange and the inner wall of the housing. The gap between the outer edge of the annular flange and the inner wall of the housing is smaller than the gap between the outer wall of the main body of the floating cylinder and the inner wall of the housing. The gap between the outer edge of the annular flange and the inner wall of the housing is preferably a slight gap, typically not exceeding 0.5 cm. This configuration not only does not affect the flow of medium below the floating cylinder, but also prevents significant shaking when the floating cylinder moves up and down within the housing of the dynamic adjustment core, thereby facilitating the stable up and down movement of the floating cylinder.

[0054] The top cover is preferably provided with a boss extending downward and inserted into the shell, the boss is cylindrical, and its outer wall is sealed with the inner wall of the shell. The two can be tightly arranged and provided with a suitable sealing ring, the inner wall of the boss is a conical surface with an inner diameter gradually expanding from top to bottom, or a section of the middle, upper or lower part of the inner wall of the boss is a conical surface with an inner diameter gradually expanding from top to bottom, the minimum inner diameter of the boss is not less than the outer diameter of the floating cylinder, and when the bottom wall of the floating cylinder contacts the bottom wall inside the shell (that is, when the floating cylinder is at the bottom inside the shell), the top end of the floating cylinder is located above the bottom end of the boss and below the top end of the conical surface of the inner wall of the boss. With such an arrangement, when the floating cylinder moves up and down in the shell, due to the presence of the conical surface on the inner wall of the boss, the distance between the outer wall of the floating cylinder and the inner wall of the boss will change, thereby changing the flow area between the outer wall of the floating cylinder and the boss, which helps to regulate the medium flow when the pressure difference between the medium inlet and the medium outlet changes.

[0055] The top ends of the housing and the top cover are preferably each provided with a radially outwardly projecting flange. The housing and top cover can be assembled within the lower chamber by inserting the housing from the upper chamber into the lower chamber (through the central through-hole on the valve seat support), with the top flange of the housing overlapping the top surface of the valve seat support. The boss of the top cover is inserted downwardly into the housing, with the top flange of the top cover overlapping the top surface of the housing flange, or overlapping the valve seat support, or overlapping the top surface of the housing flange and the valve seat support. The bottom ends of the valve core housing and the valve core both rest on the top surface of the top flange of the top cover, and the valve seat support is provided with a tongue-and-groove or stepped surface adapted to overlap the top flange of the housing. This arrangement and assembly method facilitates disassembly, assembly, and maintenance of the dynamic adjustment core within the valve body. The valve seat (top cover) and the valve seat support can be integrally formed.

[0056] Since the heating valve is provided with the dynamic adjustment core in the lower chamber, after the flow rate of the valve is set, when the pressure difference between the medium inlet and the medium outlet of the valve becomes larger, the pressure of the medium flowing into the lower part of the floating cylinder through the gap between the shell of the dynamic adjustment core and the floating cylinder will become relatively larger, pushing the floating cylinder to float up in the shell of the dynamic adjustment core (compressing the coil spring while floating up), so that the flow area between the floating cylinder and the outlet of the adjustment core is reduced (the flow area between the outer wall of the floating cylinder and the boss of the top cover, the flow area between the top end of the floating cylinder and the outlet of the adjustment core, and / or the flow area between the floating cylinder and the outlet of the adjustment core is reduced). The flow area between the spring cap and the regulating core outlet decreases, reducing media flow. When the pressure differential between the valve's media inlet and outlet decreases, the pressure of the media flowing below the floating cylinder decreases. The floating cylinder sinks under the downward thrust of the coil spring and gravity, increasing the flow area between the floating cylinder and the regulating core outlet and the media flow. This substantially prevents fluctuations in media flow or heating capacity caused by changes in the pressure differential between the valve's media inlet and outlet, helping to maintain a stable media flow. The flow rate error can be controlled within ±5%, keeping the room temperature essentially constant. In heating systems, where pressure is typically higher in the front-end pipeline and lower in the rear-end pipeline, the floating cylinder in the valve on the front-end pipeline rises, reducing media flow, while the floating cylinder in the valve on the rear-end pipeline sinks, increasing media flow. Combined with the set opening (set flow) of the valves on each pipeline, this ensures a consistent heating capacity and room temperature for each room or residence served by each pipeline.

[0057] The valve core housing outlet is typically a rectangular opening, and the valve core housing outlet corresponds laterally (or horizontally) to the position of the annular gap. The upper and lower widths of the valve core housing outlet are no greater than (preferably less than) the upper and lower widths of the annular gap. The valve core outlet corresponds laterally (or horizontally) to the position of the valve core housing outlet, and the maximum upper and lower widths of the valve core outlet are preferably less than the upper and lower widths of the valve core housing outlet. The lowest point of the lower edge of the valve core outlet is flush with the lower edge of the valve core housing outlet, or the highest point of the upper edge of the valve core outlet is flush with the upper edge of the valve core housing outlet, or the highest point of the upper edge of the valve core outlet is lower than the upper edge of the valve core housing outlet, and the lowest point of the lower edge of the valve core outlet is higher than the lower edge of the valve core housing outlet. With this arrangement, the flow setting and adjustment of the valve are completely dependent on the change in the upper and lower widths of the valve core outlet, which not only facilitates linear adjustment of the valve flow but also helps improve the accuracy of flow regulation.

[0058] The upper and lower widths of the valve core outlet can change linearly, that is, the upper and lower edges of the valve core outlet are oblique straight edges or arc-shaped edges, or the upper and lower edges of the valve core outlet are a combination of oblique straight edges or arc-shaped edges and straight edges. The upper and lower widths of the valve core outlet can also change in a step-like manner, that is, the upper and lower edges of the valve core outlet are step-shaped edges, or the upper and lower edges of the valve core outlet are a combination of step-shaped edges and oblique straight edges or arc-shaped edges.

[0059] Since the flow rate of the valve is adjusted by rotating the valve core to change the flow area between the valve core outlet and the valve core housing outlet, and the flow area between the valve core outlet and the valve core housing outlet is a plane, compared with the traditional heating valve that adjusts the flow rate of the valve by changing the distance between the valve disc and the valve seat (the flow area is an annular surface), the flow rate adjustment of the valve is more precise.

[0060] The maximum flow area between the valve core outlet and the valve core housing outlet is preferably smaller than the flow area between the regulating core outlet and the valve core cavity. Furthermore, the area of the valve core housing outlet is smaller than the flow area between the regulating core outlet and the valve core cavity. With this arrangement, the flow area at the outlet of the valve core cavity is always smaller than the flow area at the inlet. Adjusting the flow area at the outlet of the valve core cavity (the flow area between the valve core outlet and the valve core housing outlet) allows the valve set flow rate to be adjusted, thereby improving the accuracy of flow regulation.

[0061] The valve core cavity is preferably provided with a valve disc 19, which is mounted at the lower end of a valve stem 20. The valve core is provided with an axial hole, and the valve stem is coaxially positioned within the axial hole of the valve core. The top end of the valve stem is positioned within the valve body (extending upward from the valve body). The valve disc can be composed of a rigid valve disc seat and a rubber sealing gasket embedded in the valve disc seat, or it can be composed solely of a rubber sealing gasket. The valve disc and the valve seat (the regulating core outlet on the top cover) form the valve's primary sealing pair (opening and closing sealing pair). To facilitate sealing between the valve disc and the regulating core outlet, the top wall of the top cover can be provided with a tapered surface with a gradually decreasing inner diameter from top to bottom. This tapered surface serves as the sealing surface for the valve seat. The valve stem moves up and down within the axial hole of the valve core, driving the valve disc away from or toward the regulating core outlet (the extreme close position results in a tight seal between the valve disc and the regulating core outlet), thereby opening and closing the valve.

[0062] The valve stem is preferably sleeved with a spring 21. The spring is a cylindrical spring located within the axial bore of the valve core. An inwardly extending annular flange is provided at the bottom end of the axial bore of the valve core. The valve stem and the inner wall of the annular flange form a sliding, sealed fit (equipped with a suitable sealing ring). A retaining ring (or retaining ring) 22 is fixedly mounted in the middle of the valve stem. The bottom end of the spring abuts against the annular flange (equipped with a suitable gasket), and the top end of the spring abuts against the retaining ring. When downward pressure is applied to the valve stem, the stem drives the valve disc downward to seal the outlet of the regulating core (the retaining ring moves downward with the stem), closing the valve and compressing the spring. When the downward pressure on the valve stem is removed, the spring's thrust pushes the stem, which in turn drives the valve disc upward, opening the valve.

[0063] The middle portion of the valve stem may be provided with a radially inward annular groove, the retaining spring is horizontally embedded in the annular groove, and the outer edge of the retaining spring protrudes from the outer wall of the valve stem.

[0064] The axial hole of the valve core is preferably provided with a cylindrical spring sleeve 23 and a clamping cap 24, the clamping cap is located above the spring sleeve, the spring and the retaining spring are located in the spring sleeve, the top of the spring sleeve is provided with an inwardly protruding annular flange, the inner wall of the annular flange is clearance-fitted or slidingly fitted with the valve stem, when the valve is opened, the top surface of the retaining spring abuts against the bottom surface of the annular flange (at this time the spring is provided with or without pre-compression), when the valve is closed, a gap is left between the top surface of the retaining spring and the bottom surface of the annular flange, the bottom end of the spring sleeve abuts against the annular flange protruding inwardly from the bottom end of the axial hole of the valve core, the clamping cap is fixedly connected (for example, threadedly connected) to the top end of the axial hole of the valve core, the bottom end of the clamping cap abuts against the spring sleeve (provided with a suitable sealing ring), the top end of the clamping cap abuts against the adjusting member or a gap is left between it and the adjusting member, and the inner wall of the clamping cap is clearance-fitted or slidingly fitted with the valve stem. The arrangement of the spring sleeve and the compression cap can limit the upward movement of the valve stem, so that the valve stem moves up and down within a set reasonable range to realize the opening and closing of the valve.

[0065] The adjusting member is preferably in an inverted cup shape. The adjusting member and the valve core can be connected by a threaded or snap-fit connection. For example, the bottom end of the adjusting member is provided with an inwardly projecting flange (typically an annular flange), and the top end of the valve core is provided with a groove (typically an annular groove) that mates with the flange. The flange on the adjusting member engages with the groove on the valve core. Furthermore, the inner wall of the adjusting member is provided with a plurality of inwardly projecting protrusions spaced circumferentially. The top end of the valve core is provided with snap-fit grooves that match the number and position of the protrusions, and each protrusion on the adjusting member engages with a corresponding snap-fit groove. The top end of the adjusting member is preferably located outside the valve body, that is, it extends upward from the valve body. This arrangement allows the adjusting member to be rotated outside the valve body using a tool compatible with the adjusting member. The adjusting member, through which the valve core rotates within the valve core housing, changes the flow area between the valve core outlet and the valve core housing outlet, thereby adjusting the valve flow rate. The adjusting member is provided with a through-hole at the center for the valve stem to pass through.

[0066] Since the opening and closing of the valve and the flow regulation are controlled by different components respectively (the opening and closing of the valve is controlled by the valve stem, and the flow regulation is controlled by the valve core), and when controlling the opening and closing of the valve and the flow regulation, the relevant components only make a single movement (the valve stem only makes axial movement when the valve is opened and closed, and the valve core only rotates relative to the valve core sleeve when adjusting the flow). Compared with the traditional heating valve, the valve stem moves both axially and rotates during opening and closing and flow regulation (two movements at the same time), the movement form of the relevant components is single, and it is not easy to leak or malfunction, which can effectively extend the service life of the valve, and can appropriately reduce the sealing requirements and process processing requirements for related components, thereby reducing production costs.

[0067] The top of the valve body is preferably provided with a protective cap 25, which is in the shape of an inverted cup and is threadedly connected to the valve body. The top of the valve stem rests on the top wall inside the protective cap. With this arrangement, the valve can be opened and closed by rotating the protective cap on the valve body. When the protective cap is rotated to move downward relative to the valve body (usually forward rotation), the protective cap pushes the valve stem downward, and the valve closes. When the protective cap is rotated to move upward relative to the valve body (usually reverse rotation), the distance between the top wall inside the protective cap and the top of the valve body becomes larger, and the valve stem moves upward under the thrust of the spring, and the valve opens.

[0068] The top outer wall of the protective cap is preferably provided with a coupling structure that cooperates with the regulating member. With this arrangement, after the protective cap is unscrewed from the valve body, it can be reversed and then engaged with the regulating member via the coupling structure. By rotating the protective cap, the flow rate of the valve can be adjusted. Thus, when the protective cap is installed upright on the valve body, the valve can be opened and closed, while when the protective cap is installed in reverse on the regulating member, the flow rate of the valve can be adjusted, thereby facilitating the use and control of the valve.

[0069] A preferred embodiment of the snap-fit structure may include: a circular groove is centrally located on the top outer wall of the protective cap; a plurality of inwardly projecting protrusions are circumferentially disposed on the groove wall of the circular groove; and a snap-fit groove is disposed on the axial outer wall of the adjusting member corresponding in number and position to the protrusions. After the protective cap is unscrewed from the valve body, the protective cap is inverted so that the protrusions engage with corresponding slots on the adjusting member. Rotating the protective cap can then drive the valve core within the valve core housing via the adjusting member.

[0070] The center of the circular groove may be provided with a blind hole for the top end of the valve stem to be inserted into. The top wall inside the protective cap may also be provided with a blind hole for the top end of the valve stem to be inserted into.

[0071] The sidewall of the protective cap may be provided with flow scales (or flow level scales) along a circumferential direction. When the protective cap is reversed and engaged with the adjusting member, the flow scales correspond to different upper and lower width positions of the valve core outlet. The circumferential angle at which the protective cap drives the adjusting member to rotate can be determined based on the flow scales on the protective cap, thereby adjusting the flow of the valve for convenient control. The correspondence between the flow scales and different upper and lower width positions of the valve core outlet can be ensured by configuring the protrusions (and corresponding retaining grooves) on the protective cap to have different widths or by providing different spacing between adjacent protrusions (and corresponding retaining grooves) after the protective cap (after inversion) engages with the adjusting member.

[0072] A temperature bag can be fixedly provided in the protective cap. When the protective cap is forwardly mounted on the valve body, the top end of the valve stem rests on the temperature bag. With this arrangement, when the protective cap is forwardly mounted on the valve body (the protective cap can be reversely mounted on the regulating member to adjust the valve flow, and then removed and forwardly mounted on the valve body), the temperature bag can control the up and down movement of the valve stem according to the room temperature, thereby realizing automatic opening and closing of the valve according to the room temperature.

[0073] Unless otherwise specified or one preferred or optional technical means is a further limitation of another technical means, the preferred and optional technical means disclosed in the present invention can be arbitrarily combined to form several different technical solutions.

Claims

1. An adjustable flow constant temperature heating valve, comprising a valve body, wherein the valve body is provided with a medium inlet and a medium outlet, characterized in that A valve seat support is provided in the valve body, and the valve seat support is arranged horizontally, dividing the valve cavity in the valve body into an upper cavity and a lower cavity. The valve seat support is provided with a central through hole for connecting the upper cavity and the lower cavity, and the lower cavity is connected with the medium inlet. A valve core and a valve core sleeve are provided in the upper cavity, and the valve core sleeve is fixedly sealed with the inner wall of the upper cavity. An annular gap is left between the outer wall of its lower part and the inner wall of the upper cavity, and the annular gap is connected with the medium outlet. The bottom end of the valve core sleeve is connected with the The valve seat support is sealed, the valve core outer sleeve is provided with a valve core outer sleeve outlet connected to the annular gap, the valve core is coaxially arranged in the valve core outer sleeve, and rotates and seals with the valve core outer sleeve, the bottom end of the valve core is sealed with the valve seat support, the bottom of the valve core is provided with a valve core cavity connected to the central through hole, the valve core is provided with a valve core outlet for connecting the valve core cavity and the valve core outer sleeve outlet, the upper and lower widths of the valve core outlet are gradually changed along the circumference of the valve core, and the top of the valve core outer sleeve is sealed. An adjusting member connected to the valve core is provided at the end, and the adjusting member is rotatably engaged with the inner wall of the valve core sleeve. A dynamic adjusting core whose resistance changes with the pressure difference is provided in the lower chamber. The dynamic adjusting core is provided with an adjusting core inlet and an adjusting core outlet, and a medium channel connecting the adjusting core inlet and the adjusting core outlet. The adjusting core inlet is connected to the lower chamber, and the adjusting core outlet is connected to the central through hole. A valve disc is provided in the valve core chamber, and the valve disc is mounted on the lower end of the valve stem. The valve core is provided with an axial hole. The valve stem is coaxially located in the axial hole of the valve core. The top end of the valve stem is located outside the valve body. A spring is sleeved on the valve stem, and the spring is located in the axial hole of the valve core. The bottom end of the axial hole of the valve core is provided with an annular flange extending inwardly. The valve stem and the inner wall of the annular flange are slidably and sealingly engaged. A retaining spring is fixed to the middle part of the valve stem. The bottom end of the spring abuts against the annular flange, and the top end of the spring abuts against the retaining spring. A cylindrical spring sleeve and a pressing cap are provided in the axial hole of the valve core.

2. The adjustable flow constant temperature heating valve according to claim 1, characterized in that The dynamic adjustment core includes a cylindrical shell, which is provided with a top cover. The shell is fixedly connected in the lower cavity and sealed between the valve seat support. The adjustment core inlet is provided on the side wall of the shell, and the adjustment core outlet is provided on the top cover. The top cover constitutes a valve seat. A floating cylinder that can move up and down is provided in the shell, and a gap is left between the outer wall of the floating cylinder and the inner wall of the shell.

3. The adjustable flow constant temperature heating valve according to claim 2, characterized in that The bottom end of the floating cylinder is closed and the top end is open, and a floating cylinder inlet is provided on the side wall. A coil spring and a spring top cap are provided in the floating cylinder. The bottom end of the coil spring abuts against or is fixedly connected to the bottom wall of the floating cylinder, and the top end of the coil spring abuts against or is fixedly connected to the spring top cap. A gap is left between the side wall of the spring top cap and the inner wall of the floating cylinder.

4. The adjustable flow constant temperature heating valve according to claim 3, characterized in that A guide hole is provided on the top wall of the spring top cap, and a guide column extending downward is provided at the center of the top cap, and the guide column is inserted into the guide hole.

5. The adjustable flow constant temperature heating valve according to claim 4, characterized in that The regulating core outlet is a circular opening located at the center of the top cover, and the diameter of the regulating core outlet is not less than the outer diameter of the floating cylinder.

6. The adjustable flow constant temperature heating valve according to claim 5, characterized in that The top cover is provided with a boss extending downward and inserted into the shell. The boss is cylindrical, and its outer wall is sealed with the inner wall of the shell. Its inner wall is a conical surface with the inner diameter gradually expanding from top to bottom. The minimum inner diameter of the boss is not less than the outer diameter of the floating cylinder.

7. The adjustable flow constant temperature warming valve according to any one of claims 1 to 6, characterized in that The top end of the regulating member is located outside the valve body.

8. The adjustable flow constant temperature heating valve according to claim 7, characterized in that A protective cap is provided at the top of the valve body, which is in the shape of an inverted cup and is threadedly connected to the valve body. The top of the valve stem rests on the top wall inside the protective cap, and a matching clamping structure is provided on the outer wall of the top of the protective cap and the adjusting member.

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