Constant temperature control valve of radiator

Abstract

The utility model relates to a radiator constant temperature control valve which comprises a valve body which is in a vertical tubular shape, and a medium outlet is formed in the side wall of the lower portion of the valve body. The valve element is coaxially arranged in the valve body and is in rotary sealing fit with the valve body, a valve element cavity is formed in the bottom of the valve element, a valve element outlet used for communicating the valve element cavity with the medium outlet is formed in the cavity wall of the valve element cavity, and the vertical width of the valve element outlet gradually changes in the circumferential direction of the valve element; the flow adjusting piece is fixedly connected to the top end of the valve element and is in running fit with the inner wall of the valve body, and the top of the flow adjusting piece is located outside the valve body; the protective cap is in an inverted cup shape, and a matched detachable fixed connection structure is arranged between the inner wall of the protective cap and the outer wall of the upper part of the valve body; and a matched insertion positioning structure is arranged between the bottom of the hand wheel and the top of the flow adjusting part. The opening degree and the flow Kv value of the valve are controlled respectively, the accuracy of valve flow adjustment can be effectively improved, the opening degree of the valve can be automatically adjusted according to the environment temperature, and it is guaranteed that the environment temperature is basically constant.

Description

TECHNICAL FIELD

[0001] The utility model relates to radiator constant temperature control valve belongs to valve technical field. BACKGROUND

[0002] The traditional radiator control valve includes a valve body, a valve cavity is arranged in the valve body and is communicated with the inlet and outlet at both ends, a valve seat is arranged in the valve cavity, the central through hole of the valve seat is horizontally arranged and constitutes a necessary place of the medium channel, a valve clack is arranged above the valve seat, the valve clack and the valve seat constitute a valve sealing pair, and a valve rod is connected to the valve clack and drives the valve clack to move up and down to realize the opening, closing and opening degree adjustment of the valve. For a heating system or other domestic water system, the valve clack is usually composed of a hard valve clack seat and a rubber sealing gasket embedded in the valve clack seat, or only composed of a rubber sealing gasket. When the rubber sealing gasket is in contact with and pressed against the sealing surface of the valve seat, the valve is closed. When the rubber sealing gasket is away from the valve seat, the medium can pass through the gap between the valve seat and the rubber sealing gasket, and the valve is opened. The distance between the sealing surface of the valve seat and the rubber sealing gasket represents the opening degree of the valve, determines the flow area and resistance at the sealing pair, and further affects the flow of the valve.

[0003] This valve realizes the opening, closing and opening degree adjustment of the valve by driving the valve clack to move up and down through the valve rod. During the opening, closing and opening degree adjustment of the valve, the valve rod needs to move axially and rotate (two kinds of movements are performed at the same time) relative to the valve body, which has very high requirements for the sealing of the valve rod on the valve body and the process processing of the related parts. In actual application, the related sealing parts are easily damaged due to the frequent movement of the valve rod relative to the valve body, resulting in valve leakage or failure. In addition, after the valve is opened, the opening degree and flow of the valve are fixed, and the opening degree of the valve cannot be automatically adjusted according to the change of the environmental temperature to ensure the basic constancy of the environmental temperature (the environment is basically constant in temperature). CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a radiator constant temperature control valve, the opening degree and flow Kv value of the valve are controlled respectively, the accuracy of the flow regulation of the valve can be effectively improved, and the opening degree of the valve can be automatically adjusted according to the environmental temperature to ensure the basic constancy of the environmental temperature.

[0005] The technical scheme for realizing the above-mentioned purpose of the utility model is as follows: a radiator constant temperature control valve comprises:

[0006] A valve body is in the shape of a vertical pipe, a medium outlet is arranged on the side wall of the lower part of the valve body;

[0007] A valve core is coaxially arranged in the valve body and rotationally sealed with the valve body. The bottom of the valve core is provided with a valve core cavity. The cavity wall of the valve core cavity is provided with a valve core outlet for connecting the valve core cavity and the medium outlet. The upper and lower widths of the valve core outlet gradually change along the circumference of the valve core.

[0008] A flow regulating member is fixedly connected to the top end of the valve core and rotationally sealed with the inner wall of the valve body. The top of the flow regulating member is located outside the valve body.

[0009] A cap is in the shape of an inverted cup. The inner wall of the cap is provided with a detachable fixing structure matched with the upper outer wall of the valve body.

[0010] A hand wheel is provided with an insertion positioning structure matched with the top of the flow regulating member.

[0011] Preferably, the detachable fixing structure is an external thread arranged on the upper outer wall of the valve body and an internal thread arranged on the inner wall of the cap and matched with the external thread.

[0012] Preferably, the insertion positioning structure is an insertion slot arranged on the top of the flow regulating member and an insertion block arranged on the bottom of the hand wheel and matched with the insertion slot.

[0013] Preferably, the insertion slot is arranged downward from the top wall of the flow regulating member. The bottom surface of the hand wheel is provided with a circular groove. The insertion block is arranged on the groove wall of the circular groove and protrudes inward from the groove wall.

[0014] Further, the number of the insertion slots is several. The several insertion slots are uniformly distributed along the circumference of the flow regulating member. The number of the insertion blocks is the same as that of the insertion slots. The arrangement positions of the insertion blocks on the circumference of the groove wall of the circular groove correspond to the arrangement positions of the insertion slots on the circumference of the flow regulating member.

[0015] Preferably, a flow scale is arranged on the top surface of the flow regulating member along the circumference. The flow scale corresponds to the different upper and lower widths of the valve core outlet.

[0016] Preferably, a flow scale is arranged on the top surface of the hand wheel along the circumference. The flow scale on the hand wheel corresponds to the flow scale on the flow regulating member in the circumferential position.

[0017] Preferably, the widths of the insertion slots (and the corresponding insertion blocks) on the flow regulating member are different or the intervals between the adjacent insertion slots (and the corresponding insertion blocks) are different, so that the upper and lower positions (axial positions) of the hand wheel and the flow scale (or the flow scale corresponding to the circumferential position) on the flow regulating member correspond to each other when the hand wheel is inserted into the flow regulating member.

[0018] Preferably, the flow regulating member is in the shape of an inverted cup, the inner diameter of which matches the outer diameter of the top end of the valve core, and the flow regulating member and the top end of the valve core can be connected in a clamping connection, for example, the inner wall of the flow regulating member is provided with several inwardly protruding flanges (for example, two or three), the several flanges are uniformly distributed in the circumferential direction on the flow regulating member, the top end of the valve core is provided with recesses in the top wall downward, the number of the recesses corresponds to the number of the flanges, and the circumferential positions of the recesses correspond to the circumferential positions of the flanges, and the vertical middle part of the flange is provided with a horizontal clamping groove, and the vertical middle part of the recess is provided with a horizontal protrusion matched with the clamping groove, and each flange of the flow regulating member is clamped in the corresponding recess of the top of the valve core. The flow regulating member and the top end of the valve core can also be connected in other suitable fixed connection manners in the prior art, for example, threaded connection.

[0019] Preferably, the bottom end of the valve body is coaxially and sealingly connected with a medium inlet pipe, the top end of the medium inlet pipe is located in the bottom end of the valve body, the bottom end of the valve core abuts on the top end of the medium inlet pipe and is sealed, the valve core cavity is in communication with the medium inlet pipe, and a valve flap is arranged in the valve core cavity, and the valve flap and the top surface of the medium inlet pipe constitute a sealing pair of the valve.

[0020] Preferably, the top surface of the medium inlet pipe is a tapered surface with a gradually reduced inner diameter from top to bottom, and the bottom end of the valve flap is in the shape of an inverted cone, and the diameter of the bottom surface of the inverted conical bottom end of the valve flap is smaller than the inner edge diameter of the top surface (tapered surface with a gradually reduced inner diameter from top to bottom) of the medium inlet pipe.

[0021] Preferably, the medium outlet is a rectangular port in the circumferential direction of the valve body, the valve core outlet is transversely (or horizontally) corresponding to the position of the medium outlet, and the maximum up-down width of the valve core outlet is smaller than the up-down width of the medium outlet.

[0022] The lowest point of the lower edge of the valve core outlet is flush with the lower edge of the medium outlet, or the highest point of the upper edge of the valve core outlet is flush with the upper edge of the medium outlet, or the highest point of the upper edge of the valve core outlet is lower than the upper edge of the medium outlet, and the lowest point of the lower edge of the valve core outlet is higher than the lower edge of the medium outlet.

[0023] The upper and lower width of the valve core outlet can be linearly changed, i.e. the upper and lower edges of the valve core outlet are straight edges with a slope or a combination of arc edges and straight edges (one of the upper and lower edges is a straight edge with a slope or an arc edge, and the other is a straight edge), or both of the upper and lower edges of the valve core outlet are straight edges with a slope or arc edges. The upper and lower width of the valve core outlet can also be changed in steps, i.e. both of the upper and lower edges of the valve core outlet are stepped edges, or the upper and lower edges of the valve core outlet are stepped edges and straight edges (one of the upper and lower edges is a stepped edge, and the other is a straight edge), or the upper and lower edges of the valve core outlet are stepped edges and straight edges with a slope or arc edges (one of the upper and lower edges is a stepped edge, and the other is a straight edge with a slope or an arc edge).

[0024] A plurality of outward openings can be provided on the upper and lower edges of the valve core outlet at intervals, and the plurality of openings correspond to the positions of the flow scale on the flow adjusting member in the circumferential direction (also referred to as one-to-one correspondence in the upper and lower positions).

[0025] Preferably, the maximum flow area of the valve core outlet communicating with the medium outlet is smaller than the flow area of the valve core cavity communicating with the medium inlet pipe.

[0026] Preferably, the valve disc is fixedly installed at the lower end of the valve rod, the valve core is provided with a shaft hole, the valve rod is coaxially located in the shaft hole of the valve core and is in sliding sealing cooperation with the shaft hole of the valve core, the top end of the valve rod is located outside the flow adjusting member, and the flow adjusting member is provided with a through hole for the valve rod to pass through.

[0027] The valve disc can be composed of a hard valve disc seat and a rubber sealing gasket installed at the bottom end of the valve disc seat. The top cavity wall of the valve core cavity can be provided with a limiting structure, such as a ring platform or an annular stepped surface, which is adapted to the top of the valve disc seat, for limiting the highest position of the valve disc moving axially upward.

[0028] Preferably, a spring is sleeved on the valve rod, the spring is located in the shaft hole of the valve core, a snap spring (or a retaining ring) is fixedly provided at the middle part of the valve rod, the bottom end of the spring abuts against the valve disc, and the top end of the spring abuts against the snap spring.

[0029] Preferably, the middle part of the valve rod is provided with a radially inward annular groove, the snap spring is horizontally embedded in the annular groove, and the outer edge of the snap spring protrudes radially outward from the outer wall of the valve rod.

[0030] Preferably, the valve core is provided with a spring sleeve in the shaft hole, the spring and the snap spring are located in the spring sleeve, the top end of the spring sleeve is provided with an annular flange protruding inward, the valve rod and the inner wall of the annular flange are in sliding sealing cooperation, and the bottom end of the spring sleeve abuts against the valve disc.

[0031] The cap can be provided with a temperature controller, an electric heating actuator or a temperature bag, and the axial movement of the valve rod is controlled according to the ambient temperature by using the prior art.

[0032] The utility model discloses beneficial effects are:

[0033] (1) since the flow Kv value and the opening of the valve are regulated by different tools (the flow Kv value of the valve is regulated by the hand wheel, and the opening of the valve is regulated by the cap), when the flow Kv value of the valve is regulated to the preset value, the hand wheel can be detached from the flow regulating part, and the cap is installed at the top end of the valve, so that the opening of the valve can be regulated, and the top of the valve can be protected, the hand wheel can be taken away from the scene by the staff, and therefore, the flow Kv value of the valve can be changed at will by non-staff (unauthorized personnel) through the hand wheel.

[0034] (2) since the flow Kv value of the valve is regulated by rotating the valve core to change the flow area communicated between the valve core outlet and the medium outlet, and the flow area communicated between the valve core outlet and the medium outlet is a plane (equivalent to a plane), compared with the traditional radiator control valve that regulates the flow of the valve by changing the distance between the valve disc and the valve seat (the flow area is an annular surface or a circular surface), the flow regulation of the valve is more accurate, and when the flow Kv value of the valve is set through the valve core and the valve body, the flow of the valve can be kept constant, and accurate control of the required medium (usually hot water) amount at the end (the radiator) can be realized.

[0035] (3) since the opening and the flow Kv value of the valve are regulated by different components (the opening of the valve is regulated by the valve rod, and the flow Kv value is regulated by the valve core), and when the opening and the flow Kv value of the valve are regulated, the related components only make single motion (when the opening of the valve is regulated, the valve rod only makes axial motion, and when the flow Kv value of the valve is regulated, the valve core only rotates relative to the valve body), compared with the traditional radiator control valve in which the valve rod makes axial motion and rotation (two kinds of motion are simultaneously performed) when the opening and the flow are regulated, the motion form of the related components is single, and the related components are not prone to leakage or failure, the service life of the valve can be effectively prolonged, the sealing requirement and the process processing requirement of the related components can be appropriately reduced, and the production cost is reduced.

[0036] (4) Since the cap is provided with a constant temperature control device (for example, a temperature controller, an electric heating actuator or a temperature bag, etc.), when the cap is installed on the valve body, the constant temperature control device can control the axial movement of the valve stem according to the ambient temperature, so as to change the opening of the valve, realize the automatic control of the opening of the valve according to the ambient temperature, achieve the control effect of constant temperature, and ensure the basic constancy of the ambient temperature. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a sectional view structure schematic diagram of an embodiment of the utility model (the cap is installed on the valve body);

[0038] Figure 2 is a sectional view structure schematic diagram of an embodiment of the hand wheel of the utility model;

[0039] Figure 3 is Figure 2 the bottom view of the embodiment;

[0040] Figure 4 is a top view of an embodiment of the flow regulating member of the utility model;

[0041] Figure 5 is Figure 4 the bottom view of the embodiment;

[0042] Figure 6 is a structure schematic diagram of an embodiment of the valve body of the utility model;

[0043] Figure 7 is a structure schematic diagram of an embodiment of the valve core of the utility model. DETAILED DESCRIPTION

[0044] All directional indications (for example, up, down, top, bottom, inner, outer, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and do not constitute the limitation to the actual use direction, if the specific posture changes, then the directional indications also change accordingly.

[0045] Referring to Figures 1-7The utility model discloses radiator constant temperature control valve, including valve body 1, valve core 2, flow regulating piece 3, cap 4 and hand wheel 5. The valve body is vertical tubular, and the lateral wall on the lower part of the valve body is equipped with medium outlet 6, is used for the medium flow out the valve body. The valve core is coaxial in the valve body, and the rotation sealing cooperation between the valve core and the valve body (is equipped with suitable sealing ring), make the valve core shell relative the coaxial rotation of the valve body, the bottom of valve core is equipped with valve core cavity 7, is used for accommodating the medium that flows into the valve, and the cavity wall of valve core cavity is equipped with the valve core outlet 8 for the intercommunication of valve core cavity and medium outlet, make the medium that enters valve core cavity can flow out the valve through the intercommunication of valve core outlet and medium outlet, and the width of valve core outlet is gradually changed along the circumference of valve core, so that when rotating the valve core, can change the overflow area of valve core outlet and medium outlet intercommunication, thereby adjust the flow of valve (point flow Kv value). The outer diameter of valve core cavity is greater than the outer diameter of the upper part of valve core, and the inner wall of valve body is equipped with the limiting step surface that cooperates with the outer wall surface of valve core cavity. The flow regulating piece fixedly connected at the top of valve core is in rotation cooperation between the inner wall of valve body, so that the flow regulating piece can rotate relative the valve body and drive the valve core rotates together, realize the flow regulation of valve. The top of flow regulating piece is located the valve body outside (stretches out the valve body outside upwards), and the rotation operation of the same is convenient. The cap and the valve body between and the hand wheel and the flow regulating piece between all adopt detachable connecting mode, so that when needing corresponding operation to the valve, it is convenient to replace. The cap is inverted cup shape, and the inner wall and the upper part outer wall of valve body are equipped with the detachable fixed connecting structure that cooperates. The bottom of hand wheel and the top of flow regulating piece are equipped with the plug-in positioning structure that cooperates.

[0046] The detachable fixed connecting structure is preferably the external thread on the upper part outer wall of valve body and the internal thread on the inner wall of cap that cooperates with the external thread.

[0047] The plug positioning structure is preferably a slot 9 provided on the top of the flow adjusting member and a plug 10 provided on the bottom of the hand wheel and matched with the slot. The slot is preferably formed downward from the top wall of the flow adjusting member, and the bottom surface of the hand wheel is provided with a circular groove 11 in the center, the diameter of which is not less than the outer diameter of the upper part of the flow adjusting member, so that the top of the flow adjusting member can be inserted into the circular groove on the bottom surface of the hand wheel, and the plug is provided on the groove wall of the circular groove and protrudes inward from the groove wall. The number of the slots is preferably several (for example, two or three), and the several slots are uniformly distributed along the circumference of the flow adjusting member, and the number of the plugs is the same as that of the slots, and the setting positions of the plugs on the circumferential direction of the groove wall of the circular groove correspond to the setting positions of the slots on the circumferential direction of the flow adjusting member. In this way, the hand wheel and the flow adjusting member can be quickly plugged, and the flow adjusting member and the valve core connected with the flow adjusting member can be rotated by rotating the hand wheel to adjust the flow Kv value of the valve.

[0048] The top surface of the flow adjusting member is preferably provided with a flow scale along the circumference, which corresponds to different upper and lower widths of the outlet of the valve core, so that the staff can intuitively understand the current flow setting value of the valve from the top surface of the flow adjusting member. The top surface of the hand wheel is preferably provided with a flow scale along the circumference, and the flow scale on the hand wheel corresponds to the positions of the flow scale on the flow adjusting member in the circumferential direction, so that the staff can quickly adjust the flow Kv value of the valve to the target value when adjusting the flow Kv value of the valve by rotating the hand wheel. The valve body can be provided with an indication arrow, which is convenient for cooperating with the flow scales on the flow adjusting member and the hand wheel to indicate the current flow Kv value of the valve.

[0049] The widths of the slots (and the corresponding plugs) on the flow adjusting member are different, or the distances between adjacent slots (and the corresponding plugs) are different, so that when the hand wheel and the flow adjusting member are plugged, the same flow scales (or the flow scales corresponding in the circumferential direction) on the hand wheel and the flow adjusting member correspond to the upper and lower positions (axial positions) of the same flow values of the valve.

[0050] The flow regulating member is preferably in the shape of an inverted cup, the inner diameter of which matches the outer diameter of the top end of the valve core, facilitating the connection between the two. The connection between the flow regulating member and the top end of the valve core can be achieved by clamping, for example, a plurality of inwardly protruding flanges (e.g. two or three) 12 are provided on the inner wall of the flow regulating member, and a plurality of recesses 13 corresponding in number and circumferential position to the flanges are formed in the top end of the valve core. The vertical middle part of the flanges is provided with horizontal inward clamping grooves, and the vertical middle part of the recesses is provided with horizontal outward protrusions matching the clamping grooves. Each flange on the flow regulating member is clamped in the corresponding recess on the top of the valve core (the protrusions on the recesses are clamped in the clamping grooves on the corresponding flanges), and the flanges can be formed by radially inward machining of the insertion slots on the flow regulating member for insertion with the hand wheel, i.e. the outer wall of the insertion slots in the flow regulating member constitutes the flanges. In this way, when the flow regulating member is connected to the valve core, it can be positioned in both the axial and circumferential directions, and when the flow regulating member is rotated, it can drive the valve core to rotate synchronously in the valve body, changing the flow area between the outlet of the valve core and the medium outlet and regulating the flow of the valve. The connection between the flow regulating member and the top end of the valve core can also be achieved by other suitable fixing connection methods in the prior art, such as threaded connection.

[0051] The bottom end of the valve body is preferably coaxially fixedly and sealingly connected to a medium inlet pipe 14, the top end of which is located in the bottom end of the valve body, the radial outer wall of the top end of the medium inlet pipe sealingly matches the inner wall of the bottom end of the valve body (a suitable sealing member such as a sealing ring can be provided), and the bottom end of the medium inlet pipe is located outside the bottom end of the valve body (protruding downward from the bottom end of the valve body). The bottom end of the valve core abuts against and seals (hard seal or with a suitable sealing member) the top end of the medium inlet pipe. The valve core cavity communicates with the medium inlet pipe, and a valve flap is provided in the valve core cavity. The valve flap and the top surface of the medium inlet pipe constitute the opening and closing sealing pair of the valve (the top end of the medium inlet pipe corresponds to the valve seat).

[0052] The top surface of the medium inlet pipe is preferably a tapered surface with a gradually decreasing inner diameter from top to bottom, and the bottom end of the valve flap is preferably in the shape of an inverted cone. The bottom surface diameter of the inverted conical bottom end of the valve flap is smaller than the inner edge diameter of the top surface (tapered surface with gradually decreasing inner diameter from top to bottom) of the medium inlet pipe, and a portion of the inverted conical bottom end of the valve flap is always located in the medium inlet pipe (when the valve is closed, the inverted conical bottom end of the valve flap is entirely located in the medium inlet pipe). This arrangement not only improves the adjustment accuracy of the valve opening, but also helps to improve the sealing effect of the opening and closing sealing pair of the valve.

[0053] The medium outlet is preferably a rectangular port along the circumference of the valve body, the valve core outlet is horizontally corresponding to the position of the medium outlet, and the maximum up-down width of the valve core outlet is smaller than the up-down width of the medium outlet. The lowest point of the lower edge of the valve core outlet is flush with the lower edge of the medium outlet, or the highest point of the upper edge of the valve core outlet is flush with the upper edge of the medium outlet, or the highest point of the upper edge of the valve core outlet is lower than the upper edge of the medium outlet, and the lowest point of the lower edge of the valve core outlet is higher than the lower edge of the medium outlet. In this way, the flow setting and adjustment of the valve completely depend on the change of the up-down width of the valve core outlet, which facilitates linear adjustment of the valve flow and helps to improve the flow adjustment accuracy.

[0054] The up-down width of the valve core outlet can change linearly, that is, the up-down edges of the valve core outlet are inclined straight edges or arc-shaped edges combined with flat straight edges (one of the up-down edges is an inclined straight edge or arc-shaped edge, and the other is a flat straight edge), or the up-down edges of the valve core outlet are both inclined straight edges or arc-shaped edges. The up-down width of the valve core outlet can also change in steps, that is, the up-down edges of the valve core outlet are both stepped edges, or the up-down edges of the valve core outlet are stepped edges combined with flat straight edges (one of the up-down edges is a stepped edge, and the other is a flat straight edge), or the up-down edges of the valve core outlet are stepped edges combined with inclined straight edges or arc-shaped edges (one of the up-down edges is a stepped edge, and the other is an inclined straight edge or arc-shaped edge). The up edge and / or the lower edge of the valve core outlet can be provided with a plurality of outward notches at intervals, and the plurality of notches are one-to-one corresponding to the positions of the flow scale on the flow adjusting member in the circumferential direction (also referred to as one-to-one corresponding in up-down positions). In this way, when the flow of the valve is adjusted from one flow value to an adjacent flow value, the communication area between the valve core outlet and the medium outlet will suddenly increase in a very short time, and the flow will also complete the adjustment change in a very short time, which helps to improve the heating quality and effect of the heat exchanger at the rear end of the valve.

[0055] In practical applications, the valve core outlet can be opened upward from the bottom wall of the valve core without a lower edge to facilitate processing.

[0056] Since the flow area between the valve core outlet and the medium outlet is changed by rotating the valve core to adjust the Kv value of the valve, and the flow area between the valve core outlet and the medium outlet is a plane (equivalent to a plane), compared with the traditional radiator control valve which adjusts the flow by changing the distance between the valve disc and the valve seat (the flow area is an annular surface or a circular surface), the flow adjustment of the valve is more accurate, and when the Kv value of the valve is set by the valve core and the valve body, the flow of the valve can be kept constant to realize accurate control of the required medium (usually hot water) at the end (radiator).

[0057] The maximum flow area between the valve core outlet and the medium outlet is preferably smaller than the flow area between the valve core cavity and the medium inlet pipe, and further, the area of the medium outlet is smaller than the flow area between the valve core cavity and the medium inlet pipe. In this way, the flow area of the outlet end of the valve core cavity is always smaller than the flow area of the inlet end, and adjusting the flow area of the outlet end of the valve core cavity (the flow area between the valve core outlet and the medium outlet) to adjust the set flow of the valve helps to improve the accuracy of flow adjustment.

[0058] The valve disc is preferably fixedly installed at the lower end of the valve rod 15, the valve core is provided with a shaft hole, the valve rod is coaxially located in the shaft hole of the valve core and is in sliding sealing cooperation with the shaft hole of the valve core, so that the valve rod can move axially in the valve core, the top end of the valve rod is located outside the flow adjusting member (extends upward out of the valve body), and the flow adjusting member is provided with a through hole 16 for the valve rod to pass through. The valve disc can be composed of a hard valve disc seat 17 and a rubber sealing gasket 18 installed at the bottom end of the valve disc seat, and the valve disc seat is provided with an axial through hole for the valve rod to pass through and connect. By axially moving the valve rod in the shaft hole of the valve core, the valve disc is driven away from or close to the top surface of the medium inlet pipe (the limit position close to is that the valve disc is tightly sealed with the top surface of the medium inlet pipe), to realize the opening and closing and opening degree control of the valve. The top cavity wall of the valve core cavity can be provided with a limiting structure conforming to the top of the valve disc seat, such as a ring table surface or a ring stepped surface, for limiting the highest position of the axial upward movement of the valve disc.

[0059] A spring 19 is preferably sleeved on the valve rod, the spring is a cylindrical spring located in the shaft hole of the valve core, a circular table surface or a stepped surface is arranged on the inner wall of the top of the valve disc seat, a circlip (or a retaining ring) 20 is fixedly arranged on the middle part of the valve rod, the bottom end of the spring abuts against the circular table surface or the stepped surface of the valve disc seat, and the top end of the spring abuts against the circlip.

[0060] The middle part of the valve rod is provided with a radially inward annular groove, the snap spring is horizontally embedded in the annular groove, and the outer edge of the snap spring protrudes radially outward beyond the outer wall of the valve rod.

[0061] The shaft hole of the valve core is preferably provided with a spring sleeve 21, the spring and the snap spring are located in the spring sleeve, the top end of the spring sleeve is provided with an inward protruding annular flange, the valve rod is in sliding sealing cooperation or gap cooperation with the inner wall of the annular flange, the radially outer edge of the snap spring is in sliding cooperation or gap cooperation with the inner wall of the spring sleeve, and the bottom end of the spring sleeve abuts against the circular table surface or step surface of the valve seat.

[0062] When downward pressure is applied to the valve rod, the valve rod drives the valve disc to move downward to seal the top surface of the medium inlet pipe, the snap spring moves downward along with the valve rod, the valve is closed, the snap spring compresses the spring, when the downward pressure applied to the valve rod is removed, the valve disc is driven to move upward by the push of the spring through the snap spring, the valve is opened, and when appropriate downward pressure is continuously applied to the valve rod, the opening degree of the valve is maintained unchanged.

[0063] When the cap is threadedly connected to the top of the valve body, the top end of the valve rod abuts against the top wall in the cap, and the axial movement of the valve rod in the valve core can be controlled by rotating the cap, so that the opening degree of the valve is changed.

[0064] The cap can be provided with a thermostat, an electric heating actuator or a temperature bag and other constant temperature control devices (not shown in the figure), and the axial movement of the valve rod is controlled according to the ambient temperature by using the prior art, so that the opening degree of the valve is changed, the automatic control of the opening degree of the valve according to the ambient temperature is realized, the constant temperature control effect is achieved, and the basic constancy of the ambient temperature is ensured.

[0065] The center of the circular groove on the bottom surface of the hand wheel can be provided with a blind hole or a through hole 22 for inserting the top end of the valve rod, so that the upwardly protruding valve rod part of the valve body does not affect the connection of the hand wheel and the flow adjusting member.

[0066] The utility model discloses the flow Kv value and the opening degree of valve are adjusted respectively using different tools (adjusting the flow Kv value of valve adopts the hand wheel, and adjusting the opening degree of valve adopts the cap), when the flow Kv value of valve is adjusted to the preset value, the hand wheel can be detached from the flow adjusting member, the cap is installed on the top end of valve, the opening degree of valve can be adjusted, and the top of valve can be protected, the hand wheel is detached and can be taken away from the scene by staff, so that the flow Kv value of valve is changed at will by non-staff (unauthorized personnel) through the hand wheel is effectively avoided.

[0067] The utility model discloses can be used for the double -pipe heating system with normal temperature difference or high temperature difference, also can be used for single -pipe heating system, application, will control valve inserts and inserts the pipeline between the water inlet and return water of self -heating system, the bottom end of medium inlet pipe is sealedly connected with the water inlet pipe, the part of the medium outlet of the setting of valve body is connected with the pipeline or medium flow space between water inlet and return water.

[0068] The various preferred and optional technical means disclosed by the utility model can be combined arbitrarily to form several different technical schemes, except for the further limitation of one preferred or optional technical means to another technical means.

Claims

1. A radiator thermostatic control valve, characterized in that... include: The valve body is a vertically tubular structure with a medium outlet on its lower side wall. The valve core is coaxially disposed in the valve body and rotates and seals with the valve body. The bottom of the valve core is provided with a valve core cavity. The cavity wall of the valve core cavity is provided with a valve core outlet for connecting the valve core cavity and the medium outlet. The vertical width of the valve core outlet gradually changes along the circumference of the valve core. A flow regulating component is fixedly connected to the top of the valve core and rotates with the inner wall of the valve body, with its top located outside the valve body; The protective cap is shaped like an inverted cup, and its inner wall is provided with a detachable fixed connection structure that matches the upper outer wall of the valve body; The handwheel has a matching insertion and positioning structure between its bottom and the top of the flow regulating component.

2. The radiator thermostatic control valve as described in claim 1, characterized in that... The detachable fixed connection structure consists of an external thread on the upper outer wall of the valve body and an internal thread on the inner wall of the protective cap that mates with the external thread.

3. The radiator thermostatic control valve as described in claim 1, characterized in that... The insertion and positioning structure consists of a slot on the top of the flow regulator and a plug on the bottom of the handwheel that mates with the slot.

4. The radiator thermostatic control valve as described in claim 1, characterized in that... The flow regulating component has a flow scale along its circumference on its top surface, and the flow scale corresponds to the different upper and lower widths of the valve core outlet.

5. The radiator thermostatic control valve as described in claim 4, characterized in that... The top surface of the handwheel is provided with a flow rate scale along the circumference, and the flow rate scale on the handwheel corresponds one-to-one with the flow rate scale on the flow rate regulator in the circumferential direction.

6. The radiator thermostatic control valve as described in any one of claims 1-5, characterized in that... The bottom end of the valve body is coaxially and fixedly sealed with a medium inlet pipe. The top end of the medium inlet pipe is located inside the bottom end of the valve body. The bottom end of the valve core abuts against the top end of the medium inlet pipe and is sealed. The valve core cavity is connected to the medium inlet pipe. A valve disc is provided in the valve core cavity. The valve disc and the top surface of the medium inlet pipe constitute the valve's opening and closing sealing pair.

7. The radiator thermostatic control valve as described in claim 6, characterized in that... The maximum flow area where the valve core outlet connects to the medium outlet is smaller than the flow area where the valve core cavity connects to the medium inlet pipe.

8. The radiator thermostatic control valve as described in claim 6, characterized in that... The valve disc is fixedly installed at the lower end of the valve stem. The valve core has a shaft hole. The valve stem is coaxially located in the shaft hole of the valve core and slides and seals with the shaft hole of the valve core. The top end of the valve stem is located outside the flow regulating component. The flow regulating component has a through hole for the valve stem to pass through.

9. The radiator thermostatic control valve as described in claim 8, characterized in that... A spring is fitted on the valve stem, the spring is located in the shaft hole of the valve core, a retaining ring is fixed in the middle of the valve stem, the bottom end of the spring abuts against the valve disc, and the top end of the spring abuts against the retaining ring.

10. The radiator thermostatic control valve as described in claim 9, characterized in that... A spring sleeve is provided inside the shaft hole of the valve core. The spring and the snap ring are both located inside the spring sleeve. The top end of the spring sleeve is provided with an inwardly protruding annular flange. The valve stem and the inner wall of the annular flange are in sliding sealing fit. The bottom end of the spring sleeve abuts against the valve disc.

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