A thermostatic valve core with overload protection function

Abstract

This utility model discloses a thermostatic valve core with overload protection function, including a valve seat, an inner core, an overload protection device, and a thermosensitive piston. The inner core and the thermosensitive piston are arranged one above the other inside the valve seat. The inner core, from top to bottom, forms an upper cylinder cavity, a middle partition, and a lower cylinder cavity. The middle partition has a central opening connecting the upper and lower cylinder cavities. The overload protection device includes a limiting member and an overload spring. The limiting member is vertically adjustable to the lower cylinder cavity. Its upper part forms an upper rod section, and its lower part forms a spring seat. The top of the upper rod section extends through a through hole into the upper cylinder cavity and a retaining ring is installed on it. The bottom of the spring seat extends down to the cavity wall of the lower cylinder cavity to form a seat edge. The overload spring is sleeved on the limiting member, and its two ends abut against the bottom surface of the middle partition and the top surface of the seat edge. The top of the thermosensitive piston is inserted into the spring seat, allowing the overload spring to provide driving force to the thermosensitive piston through the limiting member. This utility model has an overload protection function.

Description

Technical Field

[0001] This utility model relates to the field of thermostatic valve core technology, and in particular to a thermostatic valve core with overload protection function. Background Technology

[0002] A thermostatic valve core is a device that automatically adjusts the mixing ratio of hot and cold water to maintain the temperature of the mixed water at a set temperature. A thermostatic valve core generally includes a valve seat, a valve stem rotatably mounted on top of the valve seat, and an inner core housed within the valve seat that moves up and down with the valve stem. The bottom of the valve stem inserts into the valve seat, forming a threaded stud. The inner core has a sleeve at the top that screws into the stud and a thermostatic piston at the bottom to shield the cold and hot water flow areas of the valve seat. As the valve stem rotates, the screwing action of the stud and sleeve causes the thermostatic piston to rise and fall, adjusting the shielding range of the cold and hot water flow areas. Furthermore, a temperature sensor within the thermostatic piston senses and controls the reciprocating movement of the piston body, regulating the flow ratio of cold and hot water entering the valve seat to achieve constant-temperature water output. However, when the thermostatic valve installed on the thermostatic valve core is connected to the cold and hot water in reverse, that is, hot water enters the thermostatic valve core from the cold water flow area and cold water enters the thermostatic valve core from the hot water flow area, it is easy to cause the thermostatic bulb to expand and stretch excessively, damaging the internal parts. Utility Model Content

[0003] The purpose of this utility model is to provide a thermostatic valve core with overload protection function.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A thermostatic valve core with overload protection includes a valve seat, an inner core, an overload protection device, and a thermosensitive piston. The inner core and the thermosensitive piston are arranged one above the other inside the valve seat. The inner core has an upper cylinder cavity, a middle partition, and a lower cylinder cavity formed sequentially from top to bottom. The middle partition has a through-hole in the center connecting the upper and lower cylinder cavities. The overload protection device includes a limiting member and an overload spring. The limiting member is vertically mounted in the lower cylinder cavity. It has an upper rod section at its upper part and a spring seat at its lower part. The top of the upper rod section extends from the through-hole into the upper cylinder cavity and a retaining ring is installed on it. The bottom of the spring seat extends into the cavity wall of the lower cylinder cavity to form a seat edge. The overload spring is sleeved on the limiting member, and its two ends abut against the bottom surface of the middle partition and the top surface of the seat edge. The top of the thermosensitive piston is inserted into the spring seat, so that the overload spring and the limiting member provide driving force to the thermosensitive piston.

[0006] As a further technical solution of this utility model: the thermostatic valve core with overload protection function includes a valve stem; the valve stem is rotatably mounted on the top of the valve seat, and the bottom of the valve stem is provided with a threaded stud that penetrates into the valve seat; the upper cylinder cavity is provided with a thread on the cavity wall that matches the stud, so that the stud can be screwed into the upper cylinder cavity, and the inner core can be driven to rise and fall in the valve seat by rotating the valve stem.

[0007] As a further technical solution of this utility model: the limiting member forms a through cavity that runs from top to bottom through the upper rod section and the sleeve spring seat, and the through cavity has a locking position at the section located on the sleeve spring seat that matches the top of the thermosensitive piston.

[0008] As a further technical solution of this utility model: the valve stem has a groove recessed at the bottom of the stud.

[0009] As a further technical solution of this utility model: the thermosensitive piston includes a temperature bulb and a piston body mounted on the temperature bulb, and the top of the temperature bulb is inserted into the spring seat.

[0010] As a further technical solution of this utility model: the thermostatic valve core with overload protection function includes a water outlet seat, which is installed at the bottom of the valve seat, and the water outlet seat is provided with an elastic support device for elastically supporting the temperature bulb.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model proposes a thermostatic valve core with overload protection function. Through the cooperation between the valve seat, valve stem, inner core, overload protection device and thermosensitive piston, the overload spring of the overload protection device is compressed when the temperature bulb force value F reaches the design requirement value P, leaving space for the temperature bulb to expand and elongate, thereby avoiding excessive expansion and elongation of the temperature bulb and damage to the internal parts. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a thermostatic valve core with overload protection.

[0013] Figure 2 This is a split diagram of the inner core, overload protection device, and thermal piston. Detailed Implementation

[0014] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of protection of this utility model.

[0015] Please see Figure 1 , Figure 2A thermostatic valve core with overload protection includes a valve seat 10, a valve stem 20, an inner core 30, an overload protection device 40, and a thermosensitive piston 50. The valve stem 20 is rotatably mounted on the top of the valve seat 10, and the bottom of the valve stem 20 is provided with a threaded stud 21 that penetrates into the valve seat 10. The inner core 30 and the thermosensitive piston 50 are arranged one above the other in the valve seat 10. The inner core 30 forms an upper cylindrical cavity 31, a middle partition 32, and a lower cylindrical cavity 33 from top to bottom. The upper cylindrical cavity 31 has threads on its cavity wall that match the stud 21, allowing the stud 21 to screw into the upper cylindrical cavity 31. Rotating the valve stem 20 can drive the inner core 30 to move up and down within the valve seat 10. The middle partition 32 has a through-hole 321 in its center that connects the upper cylindrical cavity 31 and the lower cylindrical cavity 33.

[0016] The overload protection device 40 includes a limiting member 41 and an overload spring 42. The limiting member 41 is vertically and vertically mounted in the lower cylinder cavity 33. Its upper part forms an upper rod section 411 with an outer diameter smaller than the diameter of the through-hole 321, and its lower part forms a spring seat 412 with an outer diameter larger than the upper rod section 411 but smaller than the inner diameter of the lower cylinder cavity 33. The top of the upper rod section 411 extends from the through hole into the upper cylinder cavity 31 and a retaining ring 401 is installed on it. The bottom of the spring seat 412 extends into the cavity wall of the lower cylinder cavity 33 to form a seat edge 402. The overload spring 42 is sleeved on the limiting member 41, and the two ends of the overload spring 42 abut against the bottom surface of the middle partition 32 and the top surface of the seat edge 402.

[0017] The top of the thermal piston 50 is inserted into the spring seat 412, so that the overload spring 42 provides a driving force P to the thermal piston 50 through the limiting member 41.

[0018] Understandably, the overload protection method of the thermostatic valve core with overload protection function of this utility model is as follows: Under normal circumstances, the force F of the temperature bulb 51 in the thermosensitive piston 50 will not reach the driving force P designed to be provided by the overload spring 42, that is, F < P, and the overload spring 42 does not work; when the thermostatic valve installed on the thermostatic valve core reverses the connection of hot and cold water, the overload spring 42 of the overload protection device 40 will be compressed when the force F of the temperature bulb 51 reaches the design requirement value P, that is, F > P, leaving space for the temperature bulb 51 to expand and elongate, thereby avoiding the temperature bulb 51 from expanding and elongating excessively and damaging the internal parts.

[0019] Furthermore, in this embodiment, the limiting member 41 forms a through cavity 43 that runs from top to bottom through the upper rod section 411 and the sleeve spring seat 412. The through cavity 43 has a locking position 431 at one end located on the sleeve spring seat 412 that matches the top of the thermal piston 50, so that the top of the thermal piston 50 can be inserted into the through cavity 43 and locked into the locking position 431.

[0020] Furthermore, in this embodiment, the valve stem 20 has a recessed groove 211 at the bottom of the stud 21 to reserve more space for the expansion and elongation of the temperature bulb 51.

[0021] Furthermore, in this embodiment, the thermosensitive piston 50 includes a temperature bulb 51 and a piston body 52 mounted on the temperature bulb 51. The top of the temperature bulb 51 is inserted into the spring seat 412 so that when the temperature bulb 51 expands or contracts under the action of hot and cold water, it drives the piston body 52 to rise and fall relative to the cold water flow area and the hot water flow area of ​​the valve seat 10.

[0022] Furthermore, in this embodiment, the thermostatic valve core with overload protection function includes a water outlet seat 60, which is installed at the bottom of the valve seat 10. The water outlet seat 60 is provided with an elastic support device 61 that elastically supports the temperature bulb 51.

[0023] In summary, the thermostatic valve core with overload protection function of this utility model, through the cooperation between valve seat 10, valve stem 20, inner core 30, overload protection device 40 and thermosensitive piston 50, compresses the overload spring 42 of overload protection device 40 when the force value F of temperature bulb 51 reaches the design requirement value P, leaving space for temperature bulb 51 to expand and elongate, thereby avoiding excessive expansion and elongation of temperature bulb 51 and damage to internal parts.

[0024] Any combination of different embodiments of this utility model, provided it does not violate the inventive concept of this utility model, shall be considered as the disclosure of this utility model; any simple modifications to the technical solution and any combination of different embodiments within the scope of the inventive concept of this utility model, without violating the inventive concept of this utility model, shall be within the protection scope of this utility model.

Claims

1. A thermostatic valve core with overload protection function, characterized in that: The device includes a valve seat (10), an inner core (30), an overload protection device (40), and a thermosensitive piston (50). The inner core (30) and the thermosensitive piston (50) are arranged one above the other inside the valve seat (10). The inner core (30) is formed from top to bottom as an upper cylinder cavity (31), a middle partition (32), and a lower cylinder cavity (33). The middle partition (32) has a through-hole (321) in the center that connects the upper cylinder cavity (31) and the lower cylinder cavity (33). The overload protection device (40) includes a limiting member (41) and an overload spring (42). The limiting member (41) is vertically adjustable to the lower cylinder cavity (33), and its upper part forms an upper rod section (4). 11) A spring seat (412) is formed in the lower part. The top of the upper rod section (411) extends through the through hole to the upper cylinder cavity (31) and a retaining ring (401) is installed thereon. The bottom of the spring seat (412) extends to the cavity wall of the lower cylinder cavity (33) to form a seat edge (402). The overload spring (42) is sleeved on the limiting member (41). The two ends of the overload spring (42) abut against the bottom surface of the middle partition (32) and the top surface of the seat edge (402). The top of the thermal piston (50) is inserted into the spring seat (412) so that the overload spring (42) can provide driving force to the thermal piston (50) through the limiting member (41).

2. The thermostatic valve core with overload protection function according to claim 1, characterized in that: Includes a valve stem (20); the valve stem (20) is rotatably mounted on the top of the valve seat (10), and the bottom of the valve stem (20) is provided with a threaded stud (21) that penetrates into the valve seat (10); the upper cylinder cavity (31) is provided with a thread on the cavity wall that matches the stud (21), so that the stud (21) can be screwed into the upper cylinder cavity (31), and the inner core (30) can be driven to rise and fall within the valve seat (10) by rotating the valve stem (20).

3. The thermostatic valve core with overload protection function according to claim 1, characterized in that: The limiting member (41) has a through cavity (43) that runs from top to bottom through the upper rod section (411) and the spring seat (412). The through cavity (43) has a locking position (431) at one end of the spring seat (412) that matches the top of the thermal piston (50).

4. The thermostatic valve core with overload protection function according to claim 2, characterized in that: The valve stem (20) has a recess (211) at the bottom of the stud (21).

5. The thermostatic valve core with overload protection function according to claim 3, characterized in that: The thermal piston (50) includes a temperature bulb (51) and a piston body (52) mounted on the temperature bulb (51). The top of the temperature bulb (51) is inserted into the engagement position (431) of the spring seat (412).

6. The thermostatic valve core with overload protection function according to claim 3, characterized in that: Includes a water outlet seat (60), which is installed at the bottom of the valve seat (10), and the water outlet seat (60) is provided with an elastic support device (61) for elastically supporting the temperature bulb (51).

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