Internal part structure of high-pressure-drop regulating valve

Abstract

The utility model relates to a high-pressure-drop regulating valve internal part structure, and belongs to the technical field of fluid control. The high-pressure-drop regulating valve internal part structure comprises a valve body, a first cavity and a second cavity, wherein the first cavity and the second cavity are arranged in the valve body; the first cavity comprises an assembly reserved cavity and a medium circulation cavity, a first through hole is formed between the lower end of the assembly reserved cavity and the second cavity, a valve seat, a lamination assembly and a sleeve are sequentially connected in an abutting mode from the cavity bottom to the cavity opening of the assembly reserved cavity, and a through-flow groove and a through-flow hole are formed in the lower end of the sleeve; according to the utility model, a high-pressure-difference fluid is subjected to primary pressure reduction through the through-flow grooves and the through-flow holes in the sleeve, and the fluid is subjected to pressure reduction when passing through each lamination through the lamination assembly formed by the plurality of laminations, so that the cavitation phenomenon generated when the high-pressure-difference fluid flows through the valve is greatly reduced, the noise generated by vibration is reduced, and the service life of the valve is prolonged. Good dynamic stability of the valve in operation is guaranteed, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The present application belongs to the field of fluid control technology, and specifically relates to a high-pressure drop regulating valve internal structure. Background Art

[0002] At present, power plants and steel mills often encounter cavitation conditions with high pressure difference and large flow. When the fluid passes through the valve, cavitation and erosion will occur, which will damage the valve. The control valve structure most commonly used in this working condition is a multi-stage sleeve graded pressure reduction structure. This structure is often operated at a small opening during use, resulting in severe erosion, valve core disintegration, internal leakage and other problems in the valve, affecting normal production and high maintenance costs. Utility Model Content

[0003] To this end, the utility model provides a high-pressure drop regulating valve internal structure to solve the problems of severe erosion, valve core disintegration, internal leakage, etc. of the existing high-pressure drop regulating valve internal structure due to the fact that the valve is often operated at a small opening during use.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In a first aspect, the utility model provides a high pressure drop regulating valve trim structure, comprising:

[0006] A valve body and a first cavity and a second cavity in the valve body;

[0007] The first cavity includes a reserved assembly cavity and a medium flow cavity, the medium flow cavity is provided with a medium inlet; the second cavity is provided with a medium outlet; a first through hole is provided between the lower end of the reserved assembly cavity and the second cavity;

[0008] The valve seat, the lamination assembly and the sleeve are abutted in sequence from the bottom to the opening of the assembly reserved cavity;

[0009] The lower end of the sleeve is provided with a flow groove and a flow hole;

[0010] The valve seat, the lamination assembly and the sleeve are all provided with a hollow cavity, the hollow cavities of the valve seat, the lamination assembly and the sleeve are sequentially connected to form a connecting cavity, the connecting cavity is connected to the first through hole, and a valve core that can move up and down in the connecting cavity is arranged in the connecting cavity; the top of the sleeve is abutted with a valve cover, and the valve cover is fixedly connected to the valve body;

[0011] The valve core comprises a valve core rod and a valve core head, and the valve core rod passes through the valve cover.

[0012] Furthermore, the stack assembly includes at least two stacks, and the stack includes stack side walls, a stack top wall, and a stack cavity; the stack top wall is provided with a second through hole and at least one third through hole.

[0013] Furthermore, the distances between the centers of the third through holes of adjacent laminations and the side walls of the laminations are all different.

[0014] Furthermore, the number of the third through holes of the lamination at the top of the lamination assembly is greater than that of the other laminations of the lamination assembly.

[0015] Furthermore, a limiting slot is provided on the outer edge of the top wall of the stack.

[0016] Furthermore, a groove is provided on the side wall of the valve core head, and a sealing ring is provided in the groove.

[0017] Furthermore, at least one fourth through hole is provided on the top wall of the valve core head.

[0018] Furthermore, at least one set of sealing materials is provided on the contact surface of the through hole between the valve core rod and the valve cover; a protrusion is provided on the top end of the sleeve; and sealing materials are provided on the contact surfaces of the protrusion, the valve cover and the valve body.

[0019] Furthermore, the assembly reserved cavity, valve seat, lamination assembly, sleeve, connecting cavity, valve core head and valve core rod are all cylindrical.

[0020] Furthermore, the diameter of the hollow cavity of the valve seat is smaller than the diameter of the valve core head, and a sealing material is provided on the inner wall of the upper end of the hollow cavity of the valve seat; and a sealing material is provided on the contact surface between the valve seat and the bottom of the assembly reserved cavity.

[0021] The utility model adopts the above technical solution, which has at least the following beneficial effects:

[0022] The high-pressure drop regulating valve internal structure of the present application performs a first-stage pressure reduction on the high-pressure differential fluid through the flow grooves and flow holes on the sleeve, and further reduces the pressure of the fluid when passing through each stacked plate through a stacking assembly composed of multiple stacked plates, thereby greatly reducing the cavitation phenomenon caused by the high-pressure differential fluid flowing through the valve, reducing the noise generated by vibration, ensuring good dynamic stability during valve operation, and extending the service life of the valve.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a high-pressure drop regulating valve trim structure provided by an exemplary embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of a valve body provided by an exemplary embodiment of the present utility model;

[0027] Figure 3 It is a structural schematic diagram of a lamination assembly provided by an exemplary embodiment of the utility model;

[0028] Figure 4 It is a schematic diagram of the structure of a laminate provided by an exemplary embodiment of the present utility model;

[0029] Figure 5 It is a structural schematic diagram of a valve core provided by an exemplary embodiment of the utility model;

[0030] Figure 6 yes Figure 1 A magnified view of part A;

[0031] Figure 7 yes Figure 1 A magnified view of part B;

[0032] Figure 8 yes Figure 1 Enlarged view of part C;

[0033] Reference numerals: 1-valve body, 2-first cavity, 3-second cavity, 4-medium inlet, 5-medium outlet, 6-first through hole, 7-valve seat, 8-laminate assembly, 9-sleeve, 10-communication cavity, 11-valve core, 12-valve cover, 13-sealing material;

[0034] 21-assembly reserved cavity, 22-medium flow cavity, 81-laminate, 811-laminate side wall, 812-laminate top wall, 813-laminate cavity, 814-second through hole, 815-third through hole, 816-limiting card slot, 91-through flow slot, 92-through flow hole, 93-protrusion, 111-valve core rod, 112-valve core head, 1121-groove, 1122-sealing ring, 1123-fourth through hole;

[0035] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0037] Power plants and steel mills often encounter cavitation conditions with high pressure difference and large flow. When the fluid passes through the valve, cavitation and erosion will occur, which will damage the valve. The control valve structure most commonly used in this condition is a multi-stage sleeve graded pressure reduction structure. This structure is often operated at a relatively small opening during use, resulting in severe erosion, valve core disintegration, internal leakage and other problems.

[0038] An embodiment of the utility model provides a high-pressure drop regulating valve internal structure, which performs a first-stage pressure reduction on the fluid with a high pressure difference through the flow grooves and flow holes on the sleeve, and further reduces the pressure of the fluid when passing through each stacking plate through a stacking plate assembly composed of multiple stacking plates, thereby greatly reducing the cavitation phenomenon caused by the high-pressure difference fluid flowing through the valve, and ensuring good dynamic stability during valve operation.

[0039] The internal structure of the high pressure drop regulating valve in the present application is described below through specific embodiments.

[0040] See also Figure 1 and Figure 2 , Figure 1 It is a structural schematic diagram of a high pressure drop regulating valve trim structure provided by an exemplary embodiment of the utility model. Figure 2 is a schematic diagram of the structure of a valve body provided by an exemplary embodiment of the present utility model; Figure 1 and Figure 2The high-pressure drop regulating valve trim structure comprises: a valve body 1 and a first cavity 2 and a second cavity 3 in the valve body 1; the first cavity 2 comprises an assembly reserved cavity 21 and a medium flow cavity 22, and the medium flow cavity 22 is provided with a medium inlet 4; the second cavity 3 is provided with a medium outlet 5; a first through hole 6 is provided between the lower end of the assembly reserved cavity 21 and the second cavity 3; a valve seat 7, a stacking assembly 8 and a sleeve 9 are abutted in sequence from the cavity bottom to the cavity opening of the assembly reserved cavity 21; a through hole 6 is provided at the lower end of the sleeve 9; The flow groove 91 and the flow hole 92; the valve seat 7, the stacking assembly 8 and the sleeve 9 are all provided with a hollow cavity, and the hollow cavities of the valve seat 7, the stacking assembly 8 and the sleeve 9 are connected in sequence to form a connecting cavity 10, and the connecting cavity 10 is connected to the first through hole 6, and a valve core 11 that can move up and down in the connecting cavity 10 is arranged in the connecting cavity 10; the top of the sleeve 9 is abutted with a valve cover 12, and the valve cover 12 is fixedly connected to the valve body 1; the valve core 11 includes a valve core rod 111 and a valve core head 112, and the valve core rod 111 passes through the valve cover 12.

[0041] It should be noted that the high-pressure drop regulating valve internal structure provided in this embodiment is suitable for power plants, steel mills and equipment that often encounters high pressure difference and large flow cavitation conditions.

[0042] Specifically, the high-pressure medium enters the medium flow chamber 22 through the medium inlet 4. When the valve core rod 111 is lifted upward, the valve core head 112 moves upward, and the high-pressure medium enters the flow groove 91 from the flow hole 92, and then reaches the connecting chamber 10 through the stack assembly 8. After entering the second cavity 3 through the first through hole 6, it flows out from the medium outlet 5. Among them, the flow hole 92 and the flow groove 91 complete a first-stage pressure reduction for the high-pressure medium, and then completes multi-stage pressure reduction through the stack assembly 8.

[0043] It can be understood that the high-pressure drop regulating valve internal structure provided in this embodiment performs a first-stage pressure reduction on the high-pressure differential fluid through the flow grooves and flow holes on the sleeve, and further reduces the pressure of the fluid when passing through each stacking plate through the stacking plate assembly composed of multiple stacking plates, thereby greatly reducing the cavitation phenomenon caused by the high-pressure differential fluid flowing through the valve, reducing the noise generated by vibration, ensuring good dynamic stability during valve operation, and extending the service life of the valve.

[0044] See also Figure 3 and Figure 4 , Figure 3 is a schematic structural diagram of a lamination assembly provided by an exemplary embodiment of the present utility model, Figure 4 is a schematic diagram of the structure of a laminate provided by an exemplary embodiment of the present invention; Figure 3 and Figure 4 The lamination assembly 8 includes at least two laminations 81 , and the lamination 81 includes a lamination side wall 811 , a lamination top wall 812 and a lamination cavity 813 ; a second through hole 814 and at least one third through hole 815 are provided on the lamination top wall 812 .

[0045] Specifically, the second through holes 814 of the plurality of laminations 81 in the lamination assembly 8 form a hollow cavity in the lamination assembly 8 , and the hollow cavity is a part of the connecting cavity 10 , and the connecting cavity 10 is used for the valve core head 112 to move up and down.

[0046] It should be noted that the third through hole 815 and the lamination cavity 813 form a pressure reduction structure, and the number of laminations 81 and the number of third through holes 815 in each lamination 81 are set according to specific application scenarios, that is, associated with specific high-pressure media.

[0047] It should be noted that after long-term use, if the lamination assembly 8 is damaged, the damaged laminations can be replaced, thereby reducing maintenance costs.

[0048] It can be understood that the high-pressure drop regulating valve internal structure provided in this embodiment can increase or decrease the number of stacking plates according to the specific high-pressure medium, so that the high-pressure drop regulating valve can be suitable for more application scenarios.

[0049] In one embodiment, the distances between the centers of the third through holes 815 of adjacent laminates 81 and the laminate sidewalls 811 are all different.

[0050] It should be noted that the positions of the third through holes 815 in two adjacent laminates 81 are set to be non-corresponding in the upper and lower parts, which can be achieved by setting different distances between the third through holes 815 and the laminate side walls 811 .

[0051] It can be understood that in the high-pressure drop regulating valve internal structure provided in this embodiment, the upper and lower adjacent stacks have third through holes for reducing pressure that are not located in corresponding positions, which can improve the overall pressure reduction effect of the stack assembly.

[0052] In one embodiment, the number of third through holes 815 of the top laminate 81 of the laminate assembly 8 is greater than that of other laminates 81 of the laminate assembly 8 .

[0053] It should be noted that after the high-pressure medium passes through the flow hole 92 and the flow groove 91, it first passes through the stack 81 at the top of the stack assembly 8. Therefore, compared with the other stacks 81, the third through holes 815 on the top stack 81 are set with the largest number, and the third through holes 815 of other stacks 81 can be gradually reduced from top to bottom.

[0054] It can be understood that the high-pressure drop regulating valve internal structure provided in this embodiment takes into account that as the pressure drop intensity gradually decreases, the number of the third through holes used for pressure reduction changes accordingly, thereby better achieving step-by-step pressure reduction.

[0055] In one embodiment, a limit slot 816 is disposed at the outer edge of the stack top wall 812 .

[0056] It should be noted that, considering that the connection between the multiple stacking sheets 81 needs to be stable and the second through holes 814 need to correspond to each other, a limiting slot 816 is provided on the outer edge of the stacking top wall 812 of the other stacking sheets 81 except the stacking sheet 81 at the top of the stacking assembly 8 .

[0057] It can be understood that the high-pressure drop regulating valve internal structure provided in this embodiment improves the stability of the stacking assembly, thereby effectively improving the stability of the high-pressure drop regulating valve.

[0058] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of the valve core provided by an exemplary embodiment of the present invention, see Figure 5 A groove 1121 is provided on the side wall of the valve core head 112 , and a sealing ring 1122 is provided in the groove 1121 .

[0059] It should be noted that a groove 1121 is provided on the side wall of the valve core head 112 , and a sealing ring 1122 is provided in the groove 1121 , which can effectively prevent the high-pressure medium from flowing upward from the contact surface between the valve core head 112 and the connecting cavity 10 .

[0060] In one embodiment, at least one fourth through hole 1123 is disposed on the top wall of the valve core head 112 .

[0061] It should be noted that when the valve core rod 111 is lifted upward, the high-pressure medium flows into the connecting chamber 10 through the stacking assembly 8, and the high-pressure medium will push the valve core head 112 upward quickly, driving the valve core rod 111 upward quickly, which will accelerate the wear of the valve core rod 111 and pose a certain risk. At least one fourth through hole 1123 is provided on the top wall of the valve core head 112, so that the connecting chamber 10 is partially connected, which can effectively reduce the upward speed of the valve core rod 111.

[0062] Specifically, the specific number of the fourth through holes 1123 may be adjusted according to the type and pressure of the high-pressure medium.

[0063] It can be understood that the high-pressure drop regulating valve internal structure provided in this embodiment can reduce the wear of the valve core stem.

[0064] See also Figure 6 , Figure 7 , Figure 6 yes Figure 1 A magnified view of part A. Figure 7 yes Figure 1 For an enlarged view of part B, see Figure 6 , Figure 7 At least one set of sealing material 13 is provided on the contact surface of the through hole between the valve core rod 111 and the valve cover 12; a protrusion 93 is provided on the top of the sleeve 9; and sealing material 13 is provided on the contact surface between the protrusion 93 and the valve cover 12 and the valve body 1.

[0065] Specifically, one or more groups of sealing materials 13 are arranged on the contact surface of the through hole between the valve core rod 111 and the valve cover 12, which effectively prevents the high-pressure medium from flowing upward after passing through the fourth through hole 1123; the specific number of groups is determined by the type and pressure of the high-pressure medium, and a protrusion 93 is arranged on the top of the sleeve 9, and sealing materials 13 are arranged on the contact surface between the protrusion 93 and the valve cover 12 and the valve body 1, which effectively prevents the high-pressure medium from flowing out from the gap between the valve cover 12 and the valve body 1 after passing through the fourth through hole 1123.

[0066] In one embodiment, the assembly reserved cavity 21, the valve seat 7, the stack assembly 8, the sleeve 9, the connecting cavity 10, the valve core rod 111 and the valve core head 112 are all cylindrical.

[0067] Specifically, the assembly reserved cavity 21, the valve seat 7, the stacking assembly 8, the sleeve 9, the connecting cavity 10, the valve core rod 111 and the valve core head 112 can be designed into other shapes according to specific application scenarios.

[0068] See also Figure 8 , Figure 8 yes Figure 1 For an enlarged view of part C, see Figure 8 The diameter of the hollow cavity of the valve seat 7 is smaller than the diameter of the valve core head 112 , and a sealing material 13 is provided on the inner wall of the upper end of the hollow cavity of the valve seat 7 ; a sealing material 13 is provided on the contact surface between the valve seat 7 and the bottom of the assembly reserved cavity 21 .

[0069] It should be noted that the diameter of the hollow cavity of the valve seat 7 is smaller than the diameter of the valve core head 112, which can prevent the valve core head 112 from moving downward from the hollow cavity of the valve seat 7; when the valve core head 112 is in a closed state, the sealing material 13 arranged on the inner wall of the upper end of the hollow cavity of the valve seat 7 can prevent the flow of water into the second cavity 3 from the gap; the sealing material 13 is arranged on the contact surface between the valve seat 7 and the bottom of the assembly reserved cavity 21, which can also prevent the flow of water into the second cavity 3 from the gap.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A high pressure drop regulating valve trim structure, characterized in that: The high pressure drop regulating valve trim structure comprises: A valve body (1) and a first cavity (2) and a second cavity (3) in the valve body (1); The first cavity (2) comprises an assembly reserved cavity (21) and a medium circulation cavity (22), wherein the medium circulation cavity (22) is provided with a medium inlet (4); the second cavity (3) is provided with a medium outlet (5); a first through hole (6) is provided between the lower end of the assembly reserved cavity (21) and the second cavity (3); The valve seat (7), the lamination assembly (8) and the sleeve (9) are sequentially abutted from the bottom to the opening of the assembly reserved cavity (21); The lower end of the sleeve (9) is provided with a flow groove (91) and a flow hole (92); The valve seat (7), the lamination assembly (8) and the sleeve (9) are all provided with a hollow cavity, and the hollow cavities of the valve seat (7), the lamination assembly (8) and the sleeve (9) are sequentially connected to form a connecting cavity (10), and the connecting cavity (10) is connected to the first through hole (6), and a valve core (11) is arranged in the connecting cavity (10) and can move up and down in the connecting cavity (10); a valve cover (12) is abutted against the top of the sleeve (9), and the valve cover (12) is fixedly connected to the valve body (1); The valve core (11) comprises a valve core rod (111) and a valve core head (112), and the valve core rod (111) passes through the valve cover (12).

2. The high pressure drop regulating valve trim structure according to claim 1, characterized in that: The lamination assembly (8) comprises at least two laminations (81), wherein the lamination (81) comprises a lamination side wall (811), a lamination top wall (812) and a lamination cavity (813); a second through hole (814) and at least one third through hole (815) are provided on the lamination top wall (812).

3. The high pressure drop regulating valve trim structure according to claim 2, characterized in that: The distances between the centers of the third through holes (815) of adjacent laminations (81) and the lamination side walls (811) are all different.

4. The high pressure drop regulating valve trim structure according to claim 2, characterized in that: The number of the third through holes (815) of the lamination (81) at the top of the lamination assembly (8) is greater than that of the other laminations (81) of the lamination assembly (8).

5. The high pressure drop regulating valve trim structure according to claim 2, characterized in that: The outer edge of the laminate top wall (812) is provided with a limit slot (816).

6. The high pressure drop regulating valve trim structure according to claim 1, characterized in that: A groove (1121) is provided on the side wall of the valve core head (112), and a sealing ring (1122) is provided in the groove (1121).

7. The high pressure drop regulating valve trim structure according to claim 1, characterized in that: At least one fourth through hole (1123) is provided on the top wall of the valve core head (112).

8. The high pressure drop regulating valve trim structure according to claim 1, characterized in that: At least one set of sealing material (13) is provided on the contact surface of the through hole between the valve core rod (111) and the valve cover (12); a protrusion (93) is provided on the top end of the sleeve (9); and sealing material (13) is provided on the contact surface between the protrusion (93), the valve cover (12) and the valve body (1).

9. The high pressure drop regulating valve trim structure according to claim 1, characterized in that: The assembly reserved cavity (21), valve seat (7), lamination assembly (8), sleeve (9), connecting cavity (10), valve core rod (111) and valve core head (112) are all cylindrical.

10. The high pressure drop regulating valve trim structure according to claim 9, characterized in that: The diameter of the hollow cavity of the valve seat (7) is smaller than the diameter of the valve core head (112), and a sealing material (13) is provided on the inner wall of the upper end of the hollow cavity of the valve seat (7); and a sealing material (13) is provided on the contact surface between the valve seat (7) and the bottom of the assembly reserved cavity (21).

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