Thermal expansion valve with noise reduction function

Abstract

The thermostatic expansion valve with the noise reduction function comprises a valve body, a mounting cavity is formed in the lower end of the valve body, a sleeve is fixed in the mounting cavity, a bracket is connected in the sleeve in an up-down sliding mode, a steel ball valve element is fixed to the top of the bracket, an interlayer is arranged in the sleeve, a noise absorption layer is filled in the interlayer, and an opening is further formed in one side of the sleeve. A positioning protruding strip is further arranged on one side of the sleeve, the outer end face of the positioning protruding strip is an inclined face, a positioning groove corresponding to the positioning protruding strip is formed in the installation cavity, a bottom cover is further included, a protruding ring corresponding to the sleeve is arranged at the top end of the bottom cover, and a spring is further arranged between the bottom cover and the bracket. And the bottom cover is connected to the bottom of the valve body in a sealing manner to seal the mounting cavity. The noise reduction valve is more convenient to assemble and better in noise reduction effect.

Description

Technical Field

[0001] The utility model relates to a thermal expansion valve with a silencer function. Background Art

[0002] Patent No. CN202630539U discloses a vibration-reducing and noise-reducing thermal expansion valve, comprising a valve body, a power head, a push rod sleeve, a push rod (4), a steel ball valve core, a valve core support, a damping clamp, a spring, an adjusting nut, and an O-ring. The valve uses the push rod sleeve in conjunction with the damping clamp to eliminate resonant vibration and noise; however, its structure is relatively complex and assembly is difficult, especially for the steel ball valve core assembly. Because the steel ball valve core must be accurately matched with the valve core hole, any assembly error will cause the entire expansion valve to malfunction. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a thermal expansion valve with a silencer function that is easier to assemble.

[0004] The technical solution of the utility model is: a thermal expansion valve with a silencer function, comprising a valve body, a mounting cavity provided at the lower end of the valve body, a valve core hole of the valve body passing through the mounting cavity and coaxially arranged with the mounting cavity, a sleeve fixed in the mounting cavity, a bracket connected to the sleeve for sliding up and down, a steel ball valve core fixed on the top of the bracket, and the steel ball valve core arranged corresponding to the valve core hole;

[0005] The sleeve has an interlayer inside, and the interlayer is filled with a sound absorbing layer;

[0006] One side of the sleeve is also provided with an opening, which is arranged corresponding to the liquid outlet of the valve body, and the interlayer is provided with an opening for avoiding position;

[0007] The sleeve also has a positioning convex strip on one side, the outer end surface of the positioning convex strip is an inclined surface, and the mounting cavity has a positioning groove corresponding to the positioning convex strip;

[0008] It also includes a bottom cover, the top of which has a convex ring corresponding to the sleeve, the lower end of the sleeve is inserted into the convex ring, a spring is provided between the bottom cover and the bracket, and the bottom cover is sealed and connected to the bottom of the valve body to close the installation cavity.

[0009] Furthermore, a first sealing ring is fixed to the outer periphery of the convex ring, and the first sealing ring is located between the convex ring and the inner wall of the installation cavity.

[0010] Furthermore, a second sealing ring is provided at the connection between the bottom cover and the valve body.

[0011] Furthermore, a third sealing ring is provided on the top of the sleeve, and the third sealing ring is located between the top of the sleeve and the top wall of the installation cavity.

[0012] Furthermore, the bracket is composed of a steel ball supporting part, a base and multiple support columns connected between the steel ball supporting part and the base. The outer periphery of the base has multiple sliders, and the sleeve has multiple slideways corresponding to each slider, and each slider matches the corresponding slideway.

[0013] Furthermore, the steel ball supporting part is composed of an upper body and a lower body, the lower body has a semicircular hole corresponding to the steel ball valve core, the upper body has a limiting hole, the steel ball valve core is arranged on the lower body, the upper body is fixed on the top of the lower body to limit the steel ball valve core, and the upper end of the steel ball valve core is exposed at the top of the upper body.

[0014] Specifically, the upper body is fixed to the lower body by fixing screws.

[0015] Specifically, the top of the sleeve is in a frustum shape.

[0016] Specifically, the inner periphery of the convex ring has a chamfered top.

[0017] Specifically, the outer periphery of the bottom cover also has a chamfer, and the valve body at the bottom of the installation cavity has a concave ring corresponding to the bottom cover. After the bottom cover is fixed to the bottom of the valve body, its bottom surface is flush with the bottom of the valve body.

[0018] The beneficial effects of the present invention are as follows: compared with the prior art, the assembly is simple and convenient. During assembly, the bracket is first placed in the sleeve, and then the lower end of the sleeve is inserted into the convex ring on the bottom cover. The spring is pre-set on the bottom cover, and the sleeve is aligned with the installation cavity, inserted, and the bottom cover is fixed to complete the assembly. The steel ball valve core can accurately match the valve core hole. In addition, since the sleeve has a built-in sound-absorbing layer interlayer, and the sleeve and the valve body are split-type designs, the transmission of resonance can be reduced, and the noise generated when the thermal expansion valve is working can be further reduced to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the utility model;

[0020] Figure 2 It is a top view of the sleeve in the utility model;

[0021] Figure 3 It is a top view of the bottom cover of the utility model.

[0022] In the figure: valve body 1, valve core hole 2, sleeve 3, bracket 4, steel ball valve core 5, sound absorbing layer 6, opening 7, liquid outlet 8, positioning ridge 9, bottom cover 10, convex ring 11, spring 12, first sealing ring 13, second sealing ring 14, third sealing ring 15, steel ball supporting part 16, base 17, support column 18, slider 19, slideway 20. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be further specifically described below with reference to embodiments and in conjunction with the accompanying drawings.

[0024] Combine Figure 1-3 As shown, a thermal expansion valve with a silencer function includes a valve body 1, a mounting cavity is provided at the lower end of the valve body 1, a valve core hole 2 of the valve body 1 passes through the mounting cavity and is coaxially arranged with the mounting cavity, a sleeve 3 is fixed in the mounting cavity, a bracket 4 is connected to the sleeve 3 for sliding up and down, a steel ball valve core 5 is fixed on the top of the bracket 4, and the steel ball valve core 5 is arranged corresponding to the valve core hole 2;

[0025] The sleeve 3 has an interlayer inside, and the interlayer is filled with a sound absorbing layer 6;

[0026] The sleeve 3 is further provided with an opening 7 on one side, the opening 7 being provided corresponding to the liquid outlet 8 of the valve body 1, and the interlayer avoiding opening 7 is provided;

[0027] The sleeve 3 also has a positioning ridge 9 on one side, the outer end surface of the positioning ridge 9 is an inclined surface, and the installation cavity has a positioning groove corresponding to the positioning ridge 9 to prevent the sleeve 3 from being installed upside down and ensure that the opening 7 matches the liquid outlet 8 after the sleeve 3 is installed;

[0028] It also includes a bottom cover 10, the top of which has a convex ring 11 corresponding to the sleeve 3, the lower end of the sleeve 3 is inserted into the convex ring 11, and a spring 12 is provided between the bottom cover 10 and the bracket 4. The bottom cover 10 is sealed and connected to the bottom of the valve body 1 to close the installation cavity.

[0029] Compared with the prior art, the above structure has the advantage of simple and convenient assembly. During assembly, the bracket 4 is first placed in the sleeve 3, and then the lower end of the sleeve 3 is inserted into the convex ring 11 on the bottom cover 10. The spring 12 is pre-set on the bottom cover 10. The sleeve 3 is aligned with the installation cavity, inserted and fixed to complete the assembly. The steel ball valve core 5 can accurately match the valve core hole 2; because the sleeve 3 has a built-in interlayer of the sound-absorbing layer 6, and the sleeve 3 and the valve body 1 are split designs, the transmission of resonance can be reduced and the noise generated when the thermal expansion valve is working can be reduced to a certain extent.

[0030] In another embodiment, Figure 1 As shown, a first sealing ring 13 is fixed to the outer periphery of the convex ring 11 , and the first sealing ring 13 is located between the convex ring 11 and the inner wall of the installation cavity.

[0031] In another embodiment, Figure 1 As shown, a second sealing ring 14 is provided at the connection between the bottom cover 10 and the valve body 1 .

[0032] In another embodiment, combined Figure 1 and Figure 2As shown, a third sealing ring 15 is further provided on the top of the sleeve 3 , and the third sealing ring 15 is located between the top of the sleeve 3 and the top wall of the installation cavity.

[0033] The above triple seals ensure the sealing of the installation cavity and prevent leakage of the expansion valve.

[0034] In another embodiment, combined Figure 1 and Figure 2 As shown, the bracket 4 is composed of a steel ball supporting portion 16, a base 17 and a plurality of support columns 18 connected between the steel ball supporting portion 16 and the base 17. The outer periphery of the base 17 has a plurality of sliders 19, and the sleeve 3 has a plurality of slideways 20 corresponding to the sliders 19. Each of the sliders 19 is matched with the corresponding slideway 20 to reduce the deadweight of the bracket 4 and make the bracket 4 slide up and down smoothly to avoid noise.

[0035] In another embodiment, Figure 1 As shown, the steel ball supporting portion 16 consists of an upper body and a lower body, the lower body has a semicircular hole corresponding to the steel ball valve core 5, the upper body has a limiting hole, the steel ball valve core 5 is arranged on the lower body, and the upper body is fixed to the top of the lower body to limit the steel ball valve core 5. The upper end of the steel ball valve core 5 is exposed at the top of the upper body to avoid inaccurate positioning of the steel ball valve core 5 due to welding, which may cause the steel ball valve core 5 to not accurately match the valve core hole 2.

[0036] Specifically, the upper body is fixed to the lower body by fixing screws so that the steel ball valve core 5 can be replaced.

[0037] In another embodiment, combined Figure 1 and Figure 2 As shown, the top of the sleeve 3 is in a frustum shape, so as to facilitate the insertion of the sleeve 3 into the installation cavity.

[0038] In another embodiment, combined Figure 1 and Figure 3 As shown, the inner circumference top of the convex ring 11 has a chamfer to facilitate the insertion of the sleeve 3 into the convex ring 11.

[0039] In another embodiment, combined Figure 1 and Figure 3 As shown, the outer top of the bottom cover 10 also has a chamfer, and the valve body 1 at the bottom of the installation cavity has a concave ring corresponding to the bottom cover 10. After the bottom cover 10 is fixed to the bottom of the valve body 1, its bottom surface is flush with the bottom of the valve body 1.

Claims

1. A thermal expansion valve with a silencer function, comprising a valve body (1), characterized in that: The lower end of the valve body (1) is provided with a mounting cavity, the valve core hole (2) of the valve body (1) passes through the mounting cavity and is coaxially arranged with the mounting cavity, a sleeve (3) is fixed in the mounting cavity, a bracket (4) is connected to the sleeve (3) for sliding up and down, a steel ball valve core (5) is fixed on the top of the bracket (4), and the steel ball valve core (5) is arranged corresponding to the valve core hole (2); The sleeve (3) has an interlayer therein, and the interlayer is filled with a sound absorbing layer (6); One side of the sleeve (3) is further provided with an opening (7), the opening (7) being provided corresponding to the liquid outlet (8) of the valve body (1), and the interlayer avoidance opening (7) being provided; One side of the sleeve (3) is also provided with a positioning convex strip (9), the outer end surface of the positioning convex strip (9) is an inclined surface, and the mounting cavity is provided with a positioning groove corresponding to the positioning convex strip (9); The valve body (1) further comprises a bottom cover (10), the top end of the bottom cover (10) having a convex ring (11) corresponding to the sleeve (3), the lower end of the sleeve (3) being inserted into the convex ring (11), a spring (12) being provided between the bottom cover (10) and the bracket (4), and the bottom cover (10) being sealingly connected to the bottom of the valve body (1) to seal the installation cavity.

2. The thermal expansion valve with a silencer function according to claim 1, characterized in that: A first sealing ring (13) is fixed on the outer periphery of the convex ring (11), and the first sealing ring (13) is located between the convex ring (11) and the inner wall of the installation cavity.

3. The thermal expansion valve with a silencer function as claimed in claim 2, characterized in that: A second sealing ring (14) is provided at the connection between the bottom cover (10) and the valve body (1).

4. The thermal expansion valve with a silencer function as claimed in claim 3, characterized in that: A third sealing ring (15) is also provided on the top of the sleeve (3), and the third sealing ring (15) is located between the top of the sleeve (3) and the top wall of the installation cavity.

5. The thermal expansion valve with a silencing function as claimed in claim 4, characterized in that: The bracket (4) is composed of a steel ball supporting portion (16), a base (17), and a plurality of support columns (18) connected between the steel ball supporting portion (16) and the base (17); the outer periphery of the base (17) is provided with a plurality of sliders (19); the sleeve (3) is provided with a plurality of slideways (20) corresponding to the sliders (19); and each slider (19) is matched with the corresponding slideway (20).

6. The thermal expansion valve with a silencer function as claimed in claim 5, characterized in that: The steel ball supporting portion (16) is composed of an upper body and a lower body, the lower body is provided with a semicircular hole corresponding to the steel ball valve core (5), the upper body is provided with a limiting hole, the steel ball valve core (5) is arranged on the lower body, the upper body is fixed to the top of the lower body to limit the steel ball valve core (5), and the upper end of the steel ball valve core (5) is exposed at the top of the upper body.

7. The thermal expansion valve with a silencer function according to claim 6, characterized in that: The upper body is fixed to the lower body by fixing screws.

8. The thermal expansion valve with a silencing function according to claim 7, characterized in that: The top of the sleeve (3) is in a frustum shape.

9. The thermal expansion valve with a silencing function according to claim 8, characterized in that: The inner periphery top of the convex ring (11) has a chamfer.

10. The thermal expansion valve with a silencing function according to claim 9, characterized in that: The outer periphery of the bottom cover (10) also has a chamfered top, and the valve body (1) at the bottom of the installation cavity has a concave ring corresponding to the bottom cover (10). After the bottom cover (10) is fixed to the bottom of the valve body (1), its bottom surface is flush with the bottom of the valve body (1).

Images