Valve core of temperature control valve

Abstract

The utility model provides a valve element of a temperature control valve, and belongs to the technical field of valve accessories. The problem that an existing temperature control valve element cannot adjust the flow is solved. The temperature control valve element comprises a valve element body and a valve element rod, the upper end of the valve element body is connected with an adjusting cover which is axially limited with the valve element body and can rotate in the circumferential direction, the valve element body is sleeved with a lead screw, the lead screw is in threaded connection with the inner wall of the valve element body through external threads, the lead screw and the adjusting cover are limited in the circumferential direction, and the valve element body is sleeved with a spring located in the lead screw. The upper end of the spring acts on the valve element rod, the valve element rod is sleeved with a first sealing ring sealed on the inner wall of the upper end of the lead screw, the valve element rod is sleeved with a second sealing ring sealed on the inner wall of the lower end of the lead screw, the valve element rod is further sleeved with a gasket allowing the lower end of the spring to abut against, and the gasket is located above the second sealing ring and abuts against the second sealing ring. The upper end of the valve element rod penetrates out of the lead screw and the adjusting cover, and the lower end of the valve element rod penetrates out of the lead screw and is fixedly connected with a sealing gasket. The flow is convenient to adjust, and the requirements of energy conservation and emission reduction can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve accessories, and relates to a valve core, in particular to a temperature control valve core. Background Art

[0002] A temperature control valve is a kind of regulating valve for heating and ventilation pipelines, which is used to regulate the flow rate of heating hot water when passing through a radiator, so as to control and adjust the indoor environment temperature. Its valve core is an important accessory, which directly affects the working stability and service life of the temperature control valve.

[0003] For example, a Chinese patent document discloses a low-noise temperature control valve core [Application No.: 201920404476.X; Authorization Publication No.: CN209654723U], which includes a valve core body. A valve core rod is inserted through the valve core body. A valve core cover is fixed at the upper end of the valve core body. An upper convex ring is arranged on the inner side surface of the upper end of the valve core cover. The upper end of the valve core rod extends out of the upper end of the valve core cover after passing through the upper convex ring. An upper groove is arranged on the inner side surface of the upper convex ring. The lower side of the upper groove penetrates the lower end surface of the upper convex ring. An upper sealing ring is installed in the upper groove. A lower convex ring is arranged on the inner side surface of the lower end of the valve core body. The lower end of the valve core rod extends out of the lower end of the valve core body after passing through the lower convex ring. A gasket, a sealing gasket and a snap ring are sequentially sleeved on the lower end of the valve core rod from top to bottom. A spring is sleeved on the valve core rod between the upper convex ring and the lower convex ring. A lower groove is arranged on the inner side surface of the lower convex ring. A lower sealing ring is installed in the lower groove. A washer is sleeved on the valve core rod between the spring and the lower concave ring. The lower end of the spring abuts against the upper end surface of the washer. A water stop sleeve is sleeved on the valve core rod outside the spring.

[0004] Through the settings of the lower sealing ring and the water stop sleeve, the above-mentioned low-noise temperature control valve core plays an isolating role for the spring and improves the service life. However, it cannot adjust the axial position of the valve core rod, that is, it cannot adjust the opening degree between the sealing gasket and the valve body, cannot limit the maximum flow rate, and the applicability is not ideal enough to meet the environmental protection requirements of energy conservation and emission reduction. Summary of the Invention

[0005] The purpose of the utility model is to provide a temperature control valve core with convenient flow regulation and good applicability for the above problems existing in the prior art.

[0006] The object of the utility model can be achieved by the following technical solutions: A temperature control valve spool, comprising a spool body and a spool rod, the spool rod axially passes through the spool body, and is characterized in that an adjusting cover which is axially limited and circumferentially rotatable with the spool body is connected to the upper end of the spool body, a lead screw is sleeved on the spool body, the lead screw is threadedly connected with the inner wall of the spool body through an external thread, the lead screw is circumferentially limited with the adjusting cover, a spring is sleeved on the spool body and located inside the lead screw, the upper end of the spring acts on the spool rod, a first sealing ring is sleeved on the spool rod and seals the inner wall at the upper end of the lead screw, a second sealing ring is sleeved on the spool rod and seals the inner wall at the lower end of the lead screw, a gasket for the lower end of the spring to abut against is also sleeved on the spool rod, the gasket is located above the second sealing ring and abuts against the second sealing ring, the upper end of the spool rod passes through the lead screw and the adjusting cover, and the lower end of the spool rod passes through the lead screw and is fixedly connected with a sealing gasket.

[0007] In the above-mentioned temperature control valve spool, a circumferentially outwardly protruding convex ring is provided in the middle of the outer wall of the lead screw, the inner wall of the spool body has a shoulder for the top of the convex ring to abut against and the inner wall of the spool body is in contact with the outer wall of the convex ring, and a third sealing ring which seals the inner wall of the spool body is embedded in the convex ring.

[0008] In the above-mentioned temperature control valve spool, a bottom cover is provided at the bottom of the lead screw, the lower end of the spool rod passes through the bottom cover, the bottom cover has a wrapping edge riveted on the outer wall of the lead screw, and the second sealing ring abuts against the bottom cover.

[0009] In the above-mentioned temperature control valve spool, a retaining ring for the upper end of the spring to abut against is embedded in the spool rod, and a washer is sleeved on the spool rod between the retaining ring and the first sealing ring.

[0010] In the above-mentioned temperature control valve spool, a base is sleeved on the lower end of the spool rod, a bearing clip is also embedded in the lower end of the spool rod, the base is for the top of the sealing gasket to abut against and the base has a flanging which wraps around the outer wall of the sealing gasket, and the bearing clip abuts against the bottom of the sealing gasket.

[0011] In the above-mentioned temperature control valve spool, a circular groove is provided on the inner wall of the spool body, and the adjusting cover has a plurality of circumferentially evenly distributed claws which are clamped into the circular groove.

[0012] In the above-mentioned temperature control valve spool, an axially extending external tooth is provided on the outer wall at the upper end of the lead screw, and an internal tooth which meshes with the external tooth is provided on the inner wall of the adjusting cover.

[0013] Compared with the prior art, the temperature control valve spool of the present utility model can change the opening degree between the sealing gasket and the temperature control valve body, is convenient for adjusting the flow rate, can limit the maximum flow rate, has good applicability, and meets the environmental protection requirements of energy conservation and emission reduction. Description of the Drawings

[0014] Figure 1 This is the three-dimensional structure diagram of the valve core of this temperature control valve.

[0015] Figure 2 This is the three-dimensional structure diagram of the valve core of this temperature control valve with the adjusting cover removed.

[0016] Figure 3 This is the three-dimensional structure diagram of the adjusting cover in the valve core of this temperature control valve.

[0017] Figure 4 This is the structural sectional view of the valve core of this temperature control valve.

[0018] In the figure, 1 is the valve core body; 1a is the shoulder; 1b is the annular groove; 2 is the valve core rod; 3 is the adjusting cover; 3a is the claw; 3b is the internal tooth; 4 is the lead screw; 4a is the convex ring; 4b is the external tooth; 5 is the spring; 6 is the first sealing ring; 7 is the second sealing ring; 8 is the gasket; 9 is the sealing gasket; 10 is the third sealing ring; 11 is the bottom cover; 11a is the edge wrapping; 12 is the retaining ring; 13 is the washer; 14 is the base; 14a is the flanging; 15 is the bearing clip. Specific embodiments

[0019] The following are specific embodiments of the present invention and in combination with the attached drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0020] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, the valve core of this temperature control valve includes a valve core body 1 and a valve core rod 2. The valve core rod 2 axially passes through the valve core body 1. The upper end of the valve core body 1 is connected with an adjusting cover 3 that is axially limited and can rotate circumferentially with it. The valve core body 1 is sleeved with a lead screw 4. The lead screw 4 is threadedly connected with the inner wall of the valve core body 1 through an external thread. The lead screw 4 is circumferentially limited with the adjusting cover 3. The valve core body 1 is sleeved with a spring 5 located inside the lead screw 4. The upper end of the spring 5 acts on the valve core rod 2. The valve core rod 2 is sleeved with a first sealing ring 6 that seals the upper end inner wall of the lead screw 4. The valve core rod 2 is sleeved with a second sealing ring 7 that seals the lower end inner wall of the lead screw 4. The valve core rod 2 is also sleeved with a gasket 8 for the lower end of the spring 5 to abut against. The gasket 8 is located above the second sealing ring 7 and abuts against the second sealing ring 7. The upper end of the valve core rod 2 passes through the lead screw 4 and the adjusting cover 3. The lower end of the valve core rod 2 passes through the lead screw 4 and is fixedly connected with a sealing gasket 9.

[0021] When the valve core of this temperature control valve is in use, rotate the adjusting cover 3. The adjusting cover 3 drives the lead screw 4 to rotate. Because the lead screw 4 and the valve core body 1 are threadedly connected, the lead screw 4 can move up and down axially along the valve core body 1. In this way, the lead screw 4 drives the valve core rod 2 to move up and down axially, thereby changing the opening degree between the sealing gasket 9 and the valve body of the temperature control valve, facilitating the adjustment of the flow rate, being able to limit the maximum flow rate, having good applicability, and meeting the environmental protection requirements of energy conservation and emission reduction.

[0022] Specifically, a radially outwardly protruding convex ring 4a is provided in the middle of the outer wall of the lead screw 4. The inner wall of the valve core body 1 has a shoulder 1a for the top of the convex ring 4a to abut against, and the inner wall of the valve core body 1 is in contact with the outer wall of the convex ring 4a. A third sealing ring 10 is embedded in the convex ring 4a to seal the inner wall of the valve core body 1. The shoulder 1a plays an axial limiting role on the convex ring 4a to prevent the lead screw 4 from damaging the adjusting cover 3. Moreover, the convex ring 4a plays a guiding role, making the axial displacement of the lead screw 4 stable and smooth. The third sealing ring 10 ensures the sealing between the convex ring 4a and the valve core body 1 to prevent medium leakage.

[0023] A bottom cover 11 is provided at the bottom of the lead screw 4. The lower end of the valve core rod 2 passes through the bottom cover 11. The bottom cover 11 has a hemming 11a riveted to the outer wall of the lead screw 4, and the second sealing ring 7 abuts against the bottom cover 11. In this way, the lead screw 4 and the bottom cover 11 are firmly connected and have good sealing performance. The second sealing ring 7 further ensures the sealing between the valve core rod 2 and the lower end of the lead screw 4 to prevent the medium from entering the lead screw 4 and ensuring the service life of the spring 5.

[0024] A retaining ring 12 for the upper end of the spring 5 to abut against is embedded in the valve core rod 2. A washer 13 is sleeved on the valve core rod 2 between the retaining ring 12 and the first sealing ring 6. The retaining ring 12 is convenient for assembly. The spring 5 provides elastic force so that the retaining ring 12 abuts against the washer 13, and the washer 13 abuts against the first sealing ring 6. In this way, the sealing performance is good and medium leakage is prevented.

[0025] A base 14 is sleeved on the lower end of the valve core rod 2. A bearing clip 15 is also embedded in the lower end of the valve core rod 2. The base 14 is for the top of the gasket 9 to abut against, and the base 14 has a flanging 14a covering the outer wall of the gasket 9. The bearing clip 15 abuts against the bottom of the gasket 9. In this way, the gasket 9 is convenient and stable to install. The setting of the base 14 and the flanging 14a makes the gasket 9 not deform and expand too much when pressed, ensuring the sealing effect.

[0026] The inner wall of the valve core body 1 has an annular groove 1b. The adjusting cover 3 has six circumferentially evenly distributed claws 3a that are snapped into the annular groove 1b. In this way, the adjusting cover 3 and the valve core body 1 are convenient to assemble. The adjusting cover 3 is axially limited with respect to the valve core body 1 and the adjusting cover 3 can rotate circumferentially relative to the valve core body 1.

[0027] The outer wall of the upper end of the lead screw 4 has an axially extending external tooth 4b. The inner wall of the adjusting cover 3 has an internal tooth 3b that meshes with the external tooth 4b. In this way, the circumferential limit between the lead screw 4 and the adjusting cover 3 is realized. The adjusting cover 3 can drive the lead screw 4 to rotate and the lead screw 4 can axially displace relative to the adjusting cover 3.

[0028] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A temperature control valve spool, comprising a spool body (1) and a spool rod (2), wherein the spool rod (2) axially passes through the spool body (1), and is characterized in that, The upper end of the described valve core body (1) is connected with an adjusting cover (3) which is axially limited thereto and can rotate circumferentially. The valve core body (1) is sleeved with a lead screw (4). The lead screw (4) is threadedly connected with the inner wall of the valve core body (1) through an external thread. The lead screw (4) is circumferentially limited with the adjusting cover (3). The valve core body (1) is sleeved with a spring (5) located inside the lead screw (4). The upper end of the spring (5) acts on the valve core rod (2). The valve core rod (2) is sleeved with a first sealing ring (6) sealed at the inner wall of the upper end of the lead screw (4). The valve core rod (2) is sleeved with a second sealing ring (7) sealed at the inner wall of the lower end of the lead screw (4). The valve core rod (2) is also sleeved with a gasket (8) for the lower end of the spring (5) to abut against. The gasket (8) is located above the second sealing ring (7) and abuts against the second sealing ring (7). The upper end of the valve core rod (2) passes through the lead screw (4) and the adjusting cover (3). The lower end of the valve core rod (2) passes through the lead screw (4) and is fixedly connected with a sealing gasket (9).

2. The thermostatic valve spool according to claim 1, characterized in that, There is a radially outwardly protruding convex ring (4a) in the middle of the outer wall of the described lead screw (4). The inner wall of the valve core body (1) has a shoulder (1a) for the top of the convex ring (4a) to abut against, and the inner wall of the valve core body (1) is in contact with the outer wall of the convex ring (4a). The convex ring (4a) is embedded with a third sealing ring (10) sealed at the inner wall of the valve core body (1).

3. The thermostatic valve spool according to claim 2, characterized in that, The bottom of the described lead screw (4) is provided with a bottom cover (11). The lower end of the valve core rod (2) passes through the bottom cover (11). The bottom cover (11) has a wrapped edge (11a) riveted to the outer wall of the lead screw (4). The second sealing ring (7) abuts against the bottom cover (11).

4. A temperature control valve spool according to claim 3, characterized in that, The described valve core rod (2) is embedded with a retaining ring (12) for the upper end of the spring (5) to abut against. The valve core rod (2) is sleeved with a washer (13) located between the retaining ring (12) and the first sealing ring (6).

5. A temperature control valve spool according to claim 4, characterized in that, The lower end of the described valve core rod (2) is sleeved with a base (14). The lower end of the valve core rod (2) is also embedded with a bearing clip (15). The base (14) is for the top of the sealing gasket (9) to abut against, and the base (14) has a turned edge (14a) wrapped around the outer wall of the sealing gasket (9). The bearing clip (15) abuts against the bottom of the sealing gasket (9).

6. A temperature control valve spool according to claim 1 or 2 or 3 or 4 or 5, characterized in that, The inner wall of the described valve core body (1) has an annular groove (1b). The adjusting cover (3) has several claw-shaped parts (3a) that are circumferentially evenly distributed and are clamped into the annular groove (1b).

7. The thermostatic valve spool according to claim 6, characterized in that The outer wall of the upper end of the described lead screw (4) has a circle of axially extending external teeth (4b). The inner wall of the adjusting cover (3) has a circle of internal teeth (3b) meshing with the external teeth (4b).

Images