A type of anti-rotation thermostatic valve core

Abstract

This utility model discloses an anti-rotation thermostatic valve core, including a valve seat, a valve stem, a guide sleeve, a bidirectional rotating shaft, and an inner core. The valve stem and guide sleeve are installed on the top of the valve seat, one above the other, and the valve stem can rotate relative to the valve seat. The valve stem has a positioning rod that penetrates into the valve seat. The guide sleeve has an upper sleeve extending into the valve seat. The inner core is vertically mounted inside the valve seat, and the inner core has a lower sleeve at its top that is vertically opposite to the upper sleeve. The bidirectional rotating shaft has a positioning port at its center, penetrating its top and bottom. It has a right-hand thread on its upper outer circumference and a left-hand thread on its lower outer circumference. The upper sleeve has a thread on its inner wall that matches the upper part of the bidirectional rotating shaft, and the lower sleeve has a thread on its inner wall that matches the lower part of the bidirectional rotating shaft. The upper part of the bidirectional rotating shaft is screwed into the upper sleeve, and the lower part of the bidirectional rotating shaft is screwed into the lower sleeve. The positioning rod of the valve stem passes into the positioning port of the bidirectional rotating shaft. This utility model can prevent rotation.

Description

Technical Field

[0001] This utility model relates to the field of valve core technology, and in particular to an anti-rotation thermostatic valve core. 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 stud with multi-threaded threads. The inner core has a sleeve at the top that engages with 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 engagement 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. The thermostatic piston also senses temperature and controls the back-and-forth movement of its body, regulating the flow ratio of cold and hot water into the valve seat to achieve constant water temperature. However, the multi-threaded stud and sleeve engagement design requires the valve stem to rotate many times to move the thermostatic piston to the predetermined position. Furthermore, if space is insufficient or the design is flawed, it is prone to self-rotation. Utility Model Content

[0003] The purpose of this utility model is to provide a thermostatic valve core that prevents self-rotation.

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

[0005] A self-rotating thermostatic valve core includes a valve seat, a valve stem, a guide sleeve, a bidirectional rotating shaft, and an inner core. The valve stem and guide sleeve are mounted on the top of the valve seat, one above the other, and the valve stem can rotate relative to the valve seat. The valve stem has a positioning rod that penetrates into the valve seat. The guide sleeve has an upper sleeve extending into the valve seat. The inner core is vertically mounted inside the valve seat, and the inner core has a lower sleeve at its top that is vertically opposite to the upper sleeve. The bidirectional rotating shaft has a positioning port at its center that passes through its top and bottom, a right-hand thread on its upper outer circumference, and a left-hand thread on its lower outer circumference. The upper sleeve has a thread on its inner wall that matches the upper part of the bidirectional rotating shaft, and the lower sleeve has a thread on its inner wall that matches the lower part of the bidirectional rotating shaft. The upper part of the bidirectional rotating shaft is screwed into the upper sleeve, and the lower part of the bidirectional rotating shaft is screwed into the lower sleeve. The positioning rod of the valve stem is inserted into the positioning port of the bidirectional rotating shaft.

[0006] As a further technical solution of this utility model: the valve seat has a positioning groove that communicates with its interior at the top, and the valve stem and the guide sleeve seat are arranged one above the other in the positioning groove; the positioning groove has a connecting thread on its inner wall, and a pressure cap is screwed to the top of the valve seat by the connecting thread of the positioning groove, and the pressure cap has a through-hole in the center for the top of the valve stem to pass through.

[0007] As a further technical solution of this utility model: the valve stem has a first annular edge that cooperates with the pressure cap, the guide sleeve has a second annular edge that cooperates with the pressure cap, and a first annular gasket is provided between the pressure cap and the first annular edge, and a second annular gasket is provided between the first annular edge and the second annular edge.

[0008] As a further technical solution of this utility model: the valve stem is provided with a first sealing ring in the area corresponding to the through-hole.

[0009] As a further technical solution of this utility model: the positioning groove is provided with a second sealing ring in the area corresponding to the bottom of the pressure cap.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model proposes an anti-rotation thermostatic valve core. Through the cooperation between the valve seat, valve stem, guide sleeve seat, bidirectional rotating shaft and inner core, the thermosensitive piston can be driven to rise and fall to a predetermined position with fewer rotations of the valve stem. Furthermore, the right-hand thread on the upper part of the bidirectional rotating shaft cooperates with the guide sleeve seat and the left-hand thread on the lower part cooperates with the lower sleeve to achieve the anti-rotation effect. Attached Figure Description

[0011] Figure 1 A schematic diagram of a thermostatic valve core designed to prevent self-rotation.

[0012] Figure 2 This is an exploded view of the valve stem, guide sleeve, bidirectional rotating shaft, and inner core. Detailed Implementation

[0013] 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.

[0014] Please see Figure 1 , Figure 2A self-rotating thermostatic valve core includes a valve seat 10, a valve stem 20, a guide sleeve seat 30, a bidirectional rotating shaft 40, and an inner core 50. The valve stem 20 and the guide sleeve seat 30 are installed on the top of the valve seat 10, one above the other, and the valve stem 20 can rotate relative to the valve seat 10. A positioning round rod 21 that penetrates into the valve seat 10 is provided at the center of its bottom. The guide sleeve seat 30 has an upper sleeve 31 that extends into the valve seat 10. The inner core 50 is vertically and vertically disposed in the valve seat 10, and the inner core 50 has a lower sleeve 51 at its top that is vertically opposite to the upper sleeve 31. The bidirectional rotating shaft 40 has a positioning port 41 at its center that passes through its top and bottom. The outer periphery is formed with a right-hand thread 42 and the lower outer periphery is formed with a left-hand thread 43. The upper sleeve 31 has a thread on its inner wall that matches the upper part of the bidirectional rotating shaft 40, and the lower sleeve 51 has a thread on its inner wall that matches the lower part of the bidirectional rotating shaft 40. The upper part of the bidirectional rotating shaft 40 is screwed into the upper sleeve 31, and the lower part of the bidirectional rotating shaft 40 is screwed into the lower sleeve 51. The positioning round rod 21 of the valve stem 20 is inserted into the positioning port 41 of the bidirectional rotating shaft 40, so that rotating the valve stem 20 can drive the bidirectional rotating shaft 40 to rotate and rise and fall synchronously along the positioning round rod 21. The inner core 50 rises and falls within the valve seat 10 as the bidirectional rotating shaft 40 rotates.

[0015] Understandably, in existing thermostatic valve cores that use a multi-threaded stud and sleeve to form a screw-in structure, a multi-start thread (n) design is used in the trapezoidal thread transmission design to ensure the axial transmission distance S, making the multi-start thread lead S = pitch P x number of starts n. In the aforementioned anti-rotation thermostatic valve core, when the right-hand thread 42 rotates clockwise one revolution, the left-hand thread 43 will simultaneously rotate counterclockwise, which is equivalent to the function of the double-start thread rotating one revolution; that is, S = P x 2 can be converted into S1 = P x 1 (left-hand), S2 = P x 1 (right-hand), S = S1 + S2.

[0016] Furthermore, in this embodiment, the valve seat 10 has a positioning groove 11 recessed at the top and communicating with its interior. The valve stem 20 and the guide sleeve seat 30 are arranged one above the other in the positioning groove 11. The positioning groove 11 has a connecting thread on its inner wall. The top of the valve seat 10 is screwed with a pressure cap 12 by the connecting thread of the positioning groove 11. The pressure cap 12 has a through-hole 121 in the center for the top of the valve stem 20 to pass through. The pressure cap 12 positions the valve stem 20 and the guide sleeve seat 30 at the top of the valve stem 20.

[0017] Furthermore, in this embodiment, the valve stem 20 has a first annular edge 22 that mates with the pressure cap 12, the guide sleeve seat 30 has a second annular edge 32 that mates with the pressure cap 12, and a first annular gasket 61 is provided between the pressure cap 12 and the first annular edge 22, and a second annular gasket 62 is provided between the first annular edge 22 and the second annular edge 32.

[0018] Furthermore, in this embodiment, the valve stem 20 is provided with a first sealing ring 63 in the area corresponding to the through-hole 121, and the positioning groove 11 is provided with a second sealing ring 64 in the area corresponding to the bottom of the pressure cap 12, so as to improve the sealing effect.

[0019] Understandably, the method of using the anti-rotation thermostatic valve core of this utility model is as follows: Rotate the valve stem 20 clockwise to drive the bidirectional rotating shaft 40 to rotate in the same direction. As the bidirectional rotating shaft 40 rotates, with the cooperation of the guide sleeve seat 30 and the right-hand thread 42 on the upper part of the bidirectional rotating shaft 40, the bidirectional rotating shaft 40 descends along the positioning round rod 21. At the same time, the inner core 50 descends with the descent of the bidirectional rotating shaft 40. With the cooperation of the lower sleeve 51 and the left-hand thread 43 on the lower part of the bidirectional rotating shaft 40, the inner core 50 descends along the bidirectional rotating shaft 40, thereby quickly driving the thermal piston at the bottom of the inner core 50 to descend and adjust its shielding range for the cold water flow area and the hot water flow area of ​​the valve seat 10.

[0020] In summary, the anti-rotation thermostatic valve core of this utility model, through the cooperation between the valve seat 10, valve stem 20, guide sleeve seat 30, bidirectional rotating shaft 40 and inner core 50, can drive the thermosensitive piston to rise and fall to a predetermined position with the valve stem 20 rotating a few turns. Furthermore, the right-hand thread 42 on the upper part of the bidirectional rotating shaft 40 cooperates with the guide sleeve seat 30, and the left-hand thread 43 on the lower part cooperates with the lower sleeve 51, thus achieving the anti-rotation effect.

[0021] 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. An anti-rotation thermostatic valve cartridge, characterized by: The valve includes a valve seat (10), a valve stem (20), a guide sleeve seat (30), a bidirectional rotating shaft (40), and an inner core (50). The valve stem (20) and the guide sleeve seat (30) are installed on the top of the valve seat (10), one above the other, and the valve stem (20) can rotate relative to the valve seat (10). It has a positioning round rod (21) that penetrates into the valve seat (10). The guide sleeve seat (30) has an upper sleeve (31) extending into the valve seat (10). The inner core (50) is vertically and vertically arranged inside the valve seat (10), and the inner core (50) has a lower sleeve (51) at the top that is vertically opposite to the upper sleeve (31). The bidirectional rotating shaft ( 40) A positioning port (41) is formed in the center, penetrating its top and bottom. A right-hand thread (42) is formed on the outer periphery of the upper part and a left-hand thread (43) is formed on the outer periphery of the lower part. The upper sleeve (31) has a thread on its inner wall that matches the upper part of the bidirectional rotating shaft (40), and the lower sleeve (51) has a thread on its inner wall that matches the lower part of the bidirectional rotating shaft (40). The upper part of the bidirectional rotating shaft (40) is screwed into the upper sleeve (31), and the lower part of the bidirectional rotating shaft (40) is screwed into the lower sleeve (51). The positioning round rod (21) of the valve stem (20) is inserted into the positioning port (41) of the bidirectional rotating shaft (40).

2. The anti-rotation thermostatic cartridge according to claim 1, wherein: The valve seat (10) has a positioning groove (11) recessed at the top and communicating with its interior. The valve stem (20) and the guide sleeve seat (30) are arranged one above the other in the positioning groove (11). The positioning groove (11) has a connecting thread on its inner wall. The top of the valve seat (10) is screwed with a pressure cap (12) by the connecting thread of the positioning groove (11). The pressure cap (12) has a through hole (121) in the center for the top of the valve stem (20) to pass through.

3. The anti-rotation thermostatic valve core according to claim 2, characterized in that: The valve stem (20) has a first annular edge (22) that mates with the gland (12), the guide sleeve seat (30) has a second annular edge (32) that mates with the gland (12), and a first annular gasket (61) is provided between the gland (12) and the first annular edge (22), and a second annular gasket (62) is provided between the first annular edge (22) and the second annular edge (32).

4. The anti-rotation thermostatic valve core according to claim 2, characterized in that: The valve stem (20) is provided with a first sealing ring (63) in the area corresponding to the through-hole (121).

5. The anti-rotation thermostatic valve core according to claim 2, characterized in that: The positioning groove (11) has a second sealing ring (64) in the area corresponding to the bottom of the pressure cap (12).

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