Anti-clamping stagnation four-way reversing valve with valve element capable of moving in radial direction

Abstract

The utility model discloses an anti-clamping stagnation four-way reversing valve with a valve element capable of moving in the radial direction. The anti-clamping stagnation four-way reversing valve is composed of a valve body, the valve element, an upper piston assembly, a lower piston assembly, an upper end cover and a lower end cover. The ball valve is characterized in that a valve element is arranged in the valve body, the two ends of the valve element are provided with a circular upper piston assembly and a circular lower piston assembly respectively, the upper piston assembly and the lower piston assembly are movably connected with the two ends of the valve element, and the valve element can move in the radial direction; the valve element is driven by the upper piston assembly and the lower piston assembly to move up and down in the axial direction of the valve body. An upper end cover and a lower end cover are respectively arranged at two ends of the valve body and form a closed space with the valve body; due to the fact that the valve element can move in the valve body in the radial direction, the valve element has a radial deformation space, the valve element can still be tightly attached to the valve body after moving, and gap leakage is prevented. Meanwhile, due to the fact that radial deformation of the valve element is allowed, the valve element can be prevented from being stuck when moving axially, and the problem that the valve element is stuck is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of reversing valves, and specifically relates to a stuck-preventing four-way reversing valve with a radially movable spool. The spool of the valve can effectively achieve automatic compensation for planar sealing, and the pushing piston can have relative radial movement with the spool. Technical Background

[0002] Existing four-way valves generally have a circular cross-section. Due to the existence of a clearance between the spool and the valve body, there is clearance leakage. Therefore, a square four-way valve has emerged, which can effectively solve the leakage problem of the circular four-way valve.

[0003] Chinese Patent with publication number CN109114281A discloses a square four-way valve, which includes a valve body, a left end cover, a right end cover and a spool assembly; the valve body is square; the spool assembly includes a left piston, a right piston, a middle partition plate, a left valve plate and a right valve plate; four channels are provided on the surface of the valve body; a square space for accommodating the spool assembly is formed between the left end cover, the right end cover and the valve body; the left valve plate is connected between the left piston and the middle partition plate, the right valve plate is connected between the right piston and the middle partition plate, the middle partition plate is connected between the left valve plate and the right valve plate, and the left valve plate and the right valve plate are cross-distributed; the left piston, the right piston and the middle partition plate of the spool assembly are square, and the spool assembly is limited inside the valve body and moves left and right inside the valve body; due to the high and low pressure difference between two channels in the disclosed square four-way valve, the radial force borne by the spool is unbalanced. If the spool also has no radial deformation space, the spool may be stuck and thus cannot axially move to achieve the commutation of refrigeration and heating. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned existing technologies and provide a square four-way reversing valve.

[0005] The technical solution provided by the utility model is: a stuck-preventing four-way reversing valve with a radially movable spool, which is composed of a valve body, a spool, an upper piston assembly, a lower piston assembly, an upper end cover and a lower end cover; the special feature is that:

[0006] The inner part of the middle of the valve body is a non-rotatable n-sided structure of the valve body, and both ends of the valve body are circular structures of the valve body;

[0007] A spool is arranged inside the valve body. The spool is an n-sided structure of the spool that conforms to the inner part of the middle of the valve body. The radial dimension of the spool is smaller than the radial dimension of the valve body; the spool moves radially inside the valve body;

[0008] Both ends of the valve core are respectively provided with a circular upper piston assembly and a lower piston assembly. The upper piston assembly and the lower piston assembly are movably connected to both ends of the valve core. There is a gap between the piston assembly and the valve core, and the valve core can move radially. The upper piston assembly and the lower piston assembly are sealed with the valve core. The valve core moves up and down along the axial direction of the valve body driven by the upper piston assembly and the lower piston assembly.

[0009] Upper end covers and lower end covers are respectively provided at both ends of the valve body, forming a closed space with the valve body.

[0010] Further, both the upper piston assembly and the lower piston assembly are composed of a piston, a first seal, an outer fixing plate, and assembly bolts. The lower end surface of the piston is a plane. An outer fixing plate is provided on the piston, and the two are fixedly connected by assembly bolts. A first seal is provided between the piston and the outer fixing plate. The upper and lower piston assemblies are fixedly connected to the valve core through driving bolts. The head of the driving bolt is located in the space formed by the piston and the outer fixing plate.

[0011] Further, at least one assembly hole is provided on the piston. The diameter of the assembly hole is larger than the diameter of the driving bolt and smaller than the diameter of the head of the driving bolt. The valve core realizes axial movement and radial movement under the drive of the driving bolt.

[0012] Further, a translation plate is provided on the piston. The driving bolt passes through the translation plate and the assembly hole on the piston, and fixes the translation plate to the valve core. The valve core, the driving bolt, and the translation plate are fixedly connected. The driving bolt moves radially along the assembly hole of the piston driven by the valve core.

[0013] Further, an upper flexible connecting plate is provided on the upper piston assembly, and a lower flexible connecting plate is provided on the lower piston assembly. The upper flexible connecting plate and the lower flexible connecting plate are respectively connected to the valve core. The valve core realizes axial movement and radial movement through the upper and lower flexible connecting plates.

[0014] Further, second seals are respectively provided between the pistons of the upper and lower piston assemblies and the valve body. There is a gap between the pistons and the inner wall of the valve body. The pistons of the upper and lower piston assemblies drive the valve core to move up and down axially. The second seals are floating, and the upper and lower piston assemblies drive the valve core to realize radial movement.

[0015] Advantages of the present utility model:

[0016] Since the valve core can move radially in the valve body, the valve core has a space for radial deformation, which can realize that the valve core can still be tightly attached to the valve body after moving, preventing gap leakage. At the same time, since the valve core is allowed to have radial deformation, it can also prevent the valve core from getting stuck when moving axially, thus effectively solving the problem of the valve core getting stuck. Description of the drawings

[0017] Figure 1It is a schematic structural view of the present utility model;

[0018] Figure 2 It is a schematic structural view of the valve body of the present utility model;

[0019] Figure 3 It is Figure 2 the top view of;

[0020] Figure 4 It is a schematic view of the mating structure of the valve core and the valve body of the present utility model;

[0021] Figure 5 It is a schematic view of the connection between the valve core and the piston of the present utility model;

[0022] Figure 6 It is a schematic view of a piston installation of the present utility model;

[0023] Figure 7 It is another schematic view of a piston installation of the present utility model;

[0024] Figure 8 Another schematic view of a piston installation of the present utility model;

[0025] Figure 9 It is a schematic view of the connection between the piston assembly and the seal of the present utility model.

[0026] In the figure: 1. Valve body, 2. Upper end cover, 3. Upper piston assembly, 4. Valve core, 5. Lower piston assembly, 6. Lower end cover, 7. Piston, 8. First seal, 9. Outer fixing plate, 10. Assembly bolt, 11. Driving bolt, 12. Translating plate, 13. Radial dimension of the valve body, 14. N-sided structure of the valve body, 15. Circular structure of the valve body, 16. Second seal, 31. Upper flexible connecting plate, 41. N-sided structure of the valve core, 42. Radial dimension of the valve core, 51. Lower flexible connecting plate, 71. Diameter of the assembly hole, 111. Diameter of the driving bolt, 112. Diameter of the head of the driving bolt, δ. Gap. Specific embodiments

[0027] For better understanding and implementation, specific embodiments are given below in conjunction with the accompanying drawings to illustrate the present utility model in detail.

[0028] As Figure 1 , 2 As shown in Figures 3, 4, and 5, a square four-way reversing valve is composed of a valve body 1, a valve core 4, an upper piston 3, a lower piston 5, an upper end cover 2, and a lower end cover 6;

[0029] The middle of the valve body 1 is a non-rotatable valve body n-gon structure 14, preferably a quadrilateral, and both ends of the valve body 1 are valve body circular structures 15; a valve core 4 is installed in the valve body 1; the valve core 4 is a valve core n-gon structure 41 that conforms to the middle of the valve body 1, and the radial dimension 42 of the valve core 4 is smaller than the radial dimension 13 of the valve body; the valve core 4 moves radially in the valve body 1;

[0030] The two ends of the valve core 4 are respectively installed with a circular upper piston assembly 3 and a lower piston assembly 5, the upper piston assembly 3 and the lower piston assembly 5 are movably connected with the two ends of the valve core 4, there is a gap δ between the piston assembly and the valve core 4, and the valve core 4 can move radially; the upper piston assembly 3 and the lower piston assembly 5 are sealed with the valve core 4; the valve core 4 moves up and down along the axial direction of the valve body 1 under the drive of the upper piston assembly 3 and the lower piston assembly 5;

[0031] An upper end cover 2 and a lower end cover 6 are respectively installed at both ends of the valve body 1 to form a closed space with the valve body 1.

[0032] like Figure 6 As shown, the upper piston assembly 3 and the lower piston assembly 5 are both composed of a piston 7, a first sealing member 8, an outer fixing plate 9 and an assembly bolt 10. The lower end surface of the piston 7 is a plane. There is at least one assembly hole on the piston 7. The assembly hole diameter 71 is larger than the drive bolt diameter 111, and the assembly hole diameter 71 is smaller than the drive bolt head diameter 112. The outer fixing plate 9 is installed on the piston 7, and the two are fixedly connected by the assembly bolt 10. The first sealing member 8 is installed between the piston 7 and the outer fixing plate 9 to prevent the gas from flowing out of the valve core 4 side. The drive bolt 11 is fixed to the valve core 4 through the assembly hole on the piston 7, and the fixing method can be threading, welding, riveting, embedding, etc. The head of the drive bolt 11 is located in the space formed by the piston 7 and the outer fixing plate 9. The valve core 4 realizes axial movement under the drive of the drive bolt 11. Due to the gap relationship between the drive bolt diameter 111, the assembly hole diameter 71 and the drive bolt head diameter 112, the valve core 4 can realize radial movement.

[0033] like Figure 7 As shown, a translation plate 12 is installed on the piston 7, and a driving bolt 11 passes through the assembly holes on the translation plate 12 and the piston 7 to fix the translation plate 12 to the valve core 4; the valve core 4, the driving bolt 11 and the translation plate 12 are fixedly connected, and the driving bolt 11 moves radially along the assembly hole of the piston 7 under the drive of the valve core 4.

[0034] like Figure 8 As shown, an upper flexible connecting plate 31 is installed on the upper piston assembly 3, and a lower flexible connecting plate 51 is installed on the lower piston assembly 5. The upper flexible connecting plate 31 and the lower flexible connecting plate 51 are respectively connected to the valve core 4. The flexible connecting plates are flexible, so that the valve core 4 can achieve axial movement through the upper and lower flexible connecting plates. Because the flexible plates and the valve core 4 are not solidified, the valve core can move radially.

[0035] As Figure 9 shown, second seals 16 are respectively installed between pistons 7 of the upper and lower piston assemblies and valve body 1. There is a gap between piston 7 and the inner wall of valve body 1. Pistons 7 of the upper and lower piston assemblies drive spool 4 to axially move up and down; second seals 16 are floating and elastic. The upper and lower piston assemblies can drive spool 4 to radially offset, so as to perform compensation and achieve radial movement.

[0036] It should be understood that the technical features not elaborated in this specification all belong to the prior art. Although the embodiments of the utility model patent are described above in conjunction with the accompanying drawings, the utility model is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art can, under the inspiration of the utility model, without departing from the purpose of the utility model and the scope protected by the claims, also make more forms, and all of these fall within the protection scope of the utility model.

Claims

1. A four-way reversing valve with a radially movable valve core, comprising a valve body (1), a valve core (4), an upper piston assembly (3), a lower piston assembly (5), an upper end cover (2) and a lower end cover (6); characterized in that: The middle of the valve body (1) is a non-rotatable valve body n-gonal structure (14), and the two ends of the valve body (1) are valve body circular structures (15); The valve body (1) is provided with a valve core (4), the valve core (4) being a valve core n-gonal structure (41) conforming to the middle interior of the valve body (1), and the radial dimension (42) of the valve core being smaller than the radial dimension (13) of the valve body; the valve core (4) moves radially within the valve body (1); The two ends of the valve core (4) are respectively provided with a circular upper piston assembly (3) and a lower piston assembly (5); the upper piston assembly (3) and the lower piston assembly (5) are movably connected to the two ends of the valve core (4); a gap (δ) is provided between the piston assembly and the valve core (4); the valve core (4) can move radially; a seal is achieved between the upper piston assembly (3) and the lower piston assembly (5) and the valve core (4); the valve core (4) moves up and down along the axial direction of the valve body (1) under the drive of the upper piston assembly (3) and the lower piston assembly (5); An upper end cover (2) and a lower end cover (6) are respectively provided at both ends of the valve body (1), forming a closed space with the valve body (1).

2. The anti-stuck four-way reversing valve with radially movable valve core according to claim 1, characterized in that: The upper piston assembly (3) and the lower piston assembly (5) are both composed of a piston (7), a first sealing member (8), an outer fixing plate (9) and an assembly bolt (10); the lower end surface of the piston (7) is a plane, the outer fixing plate (9) is provided on the piston (7), and the two are fixedly connected by the assembly bolt (10); a first sealing member (8) is provided between the piston (7) and the outer fixing plate (9); the upper and lower piston assemblies are fixedly connected to the valve core (4) by a driving bolt (11); the head of the driving bolt (11) is located in the space formed by the piston (7) and the outer fixing plate (9).

3. The anti-stuck four-way reversing valve with radially movable valve core according to claim 2, characterized in that: The piston (7) has at least one assembly hole, the assembly hole diameter (71) is larger than the drive bolt diameter (111), and the assembly hole diameter (71) is smaller than the drive bolt head diameter (112); the valve core (4) is driven by the drive bolt (11) to achieve axial movement and radial movement.

4. The anti-stuck four-way reversing valve with radially movable valve core according to claim 2 or 3, characterized in that: A translation plate (12) is provided on the piston (7), and the driving bolt (11) passes through the assembly holes on the translation plate (12) and the piston (7) to fix the translation plate (12) to the valve core (4); the valve core (4), the driving bolt (11) and the translation plate (12) are fixedly connected, and the driving bolt (11) moves radially along the assembly hole of the piston (7) under the drive of the valve core (4).

5. The anti-stuck four-way reversing valve with radially movable valve core according to claim 1, characterized in that: An upper flexible connecting plate (31) is provided on the upper piston assembly (3), and a lower flexible connecting plate (51) is provided on the lower piston assembly (5); the upper flexible connecting plate (31) and the lower flexible connecting plate (51) are respectively connected to the valve core (4); the valve core (4) achieves axial movement and radial movement through the upper and lower flexible connecting plates.

6. The anti-stuck four-way reversing valve with radially movable valve core according to claim 1, characterized in that: A second sealing member (16) is provided between the piston (7) of the upper and lower piston assemblies and the valve body (1), respectively; a gap is provided between the piston (7) and the inner wall of the valve body (1); the pistons (7) of the upper and lower piston assemblies drive the valve core (4) to move axially up and down; the second sealing member (16) is floating; the upper and lower piston assemblies drive the valve core (4) to move radially.

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