Pressure building valve

Abstract

The utility model discloses a pressure building valve which comprises a valve body, a valve cover, an executing mechanism and a circulation channel arranged in the valve body, two groups of valve clacks used for blocking the circulation channel are arranged in the valve body, the number of the valve clacks is two, the two groups of valve clacks are arranged in parallel, and an abutting spring is arranged between the two groups of valve clacks. A lifting cavity corresponding to the valve clack is formed in the valve body. According to the utility model, the double-valve-clack structure is arranged, and the spring is designed between the double valve clacks, so that the two valve clacks are tightly attached to the sealing surface, the adjusting performance is improved, compared with a single-valve-clack design, the double valve clacks and the spring are adopted, the sealing performance of the valve clacks of the valve is improved, and the conditions of inner leakage of the valve clacks, reduction of the sealing performance and reduction of the adjusting capacity of the valve are reduced; the threaded hole is formed in the valve clack, the flow can be adjusted according to the field use requirement, and a screw can be arranged in the threaded hole for sealing so as to meet the requirement for building the pressure difference, and the adaptability of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a pressure-holding valve. Background Art

[0002] A "pressure holding valve" is a fluid control component that is usually used in a piping system to keep the pressure in the pipeline within a specific range. It can maintain the set pressure by automatically adjusting the flow of fluid into or out of the system to ensure the safety and efficiency of the system.

[0003] The existing pressure-holding valve is not convenient for adjusting the cross-sectional area at the minimum flow rate to control the flow rate when in use, and the single-flap valve will cause internal leakage due to aging and wear after long-term use, resulting in non-linear flow regulation and affecting the working accuracy of the boiler. Therefore, a pressure-holding valve is proposed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure-holding valve to address the above-mentioned deficiencies and to achieve flow control by adjusting the cross-sectional area at the minimum flow rate, and to solve the problem that a single-flap valve will cause internal leakage due to aging and wear after long-term use, resulting in non-linear flow regulation and affecting the working accuracy of the boiler.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a pressure holding valve, comprising a valve body, a valve cover, an actuator and a flow channel arranged in the valve body, wherein a valve flap is arranged in the valve body to block the flow channel.

[0006] There are two groups of valve flaps, which are arranged in parallel. A resistance spring is provided between the two groups of valve flaps, and the resistance spring is used to resist the two groups of valve flaps from moving apart and continuously contacting with the sealing surface provided in the valve body.

[0007] The valve body is provided with a lifting cavity corresponding to the valve disc;

[0008] The lifting chamber and the side wall of the circulation channel are provided with guide grooves, and the two sides of the valve disc are provided with guide strips corresponding to the guide grooves;

[0009] The guide groove has a width greater than that of the guide strip, and is used to provide movement space for the valve flap when the sealing surface is worn, so that the valve flap moves toward and fits the sealing surface to avoid internal leakage.

[0010] Furthermore, a plurality of threaded holes are provided on the two groups of valve flaps;

[0011] A screw is arranged in the threaded hole, and the screw is used to block the threaded hole to adjust the throttling area at the minimum flow rate.

[0012] Furthermore, the valve body is provided with a slot for inserting the valve flap, and sealing surfaces are provided on both side walls of the slot.

[0013] Furthermore, sixteen threaded holes distributed in a rectangular shape are provided in the middle of the valve disc for normal pressure holding.

[0014] Furthermore, the lower part of the valve flap is provided with thirteen threaded holes distributed in a triangle and corresponding to the slots;

[0015] When the valve flap is fully closed, thirteen threaded holes are hidden in the slots, and when the valve flap is lifted, some threaded holes are exposed for adjusting the valve flow.

[0016] Furthermore, the actuator also includes a valve stem extending into the interior of the valve body;

[0017] The top of the valve disc is provided with a clamping ring corresponding to the valve stem, and the cross-sections of the two sets of clamping rings are oppositely arranged in an L-shape, and are used for rotationally connecting with the valve stem;

[0018] The valve flap is transmission-connected with the actuator through two sets of clamping rings, and the valve flap is used to open and close with the driving of the actuator.

[0019] The beneficial effects of the utility model are embodied in:

[0020] The utility model has a double valve flap structure with a spring designed between the double valve flaps to ensure that the two valve flaps are tightly attached to the cover and the adjustment performance is improved. Compared with the single valve flap design, the double valve flap plus spring is used to increase the sealing performance of the valve flap, reduce internal leakage caused by sealing surface wear, reduce sealing performance, and reduce valve adjustment ability. At the same time, a threaded hole is provided on the valve flap, and the flow rate can be adjusted according to on-site use needs, and a screw can be set in the threaded hole for sealing to meet the pressure difference and improve the adaptability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional view of the utility model;

[0022] Figure 2 It is a structural sectional view of the utility model;

[0023] Figure 3 It is a cross-sectional view of another embodiment of the utility model;

[0024] Figure 4 It is a partial view of the utility model;

[0025] Figure 5 It is a partial view of the utility model.

[0026] In the figure:

[0027] 1. Valve body;

[0028] 2. Circulation channel;

[0029] 3. Valve cover;

[0030] 4. Actuator; 41. Valve stem;

[0031] 5. Valve disc; 51. Threaded hole; 52. Clamp ring; 53. Resistance spring; 54. Guide strip. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-5 The utility model discloses a pressure-holding valve, comprising a valve body 1, a valve cover 3, an actuator 4 and a flow channel 2 arranged in the valve body 1, wherein a valve flap 5 for blocking the flow channel 2 is arranged in the valve body 1.

[0034] There are two groups of valve flaps 5, which are arranged in parallel. A resisting spring 53 is arranged between the two groups of valve flaps 5. The resisting spring 53 is used to resist the two groups of valve flaps 5 from moving apart and continuously contacting the sealing surface arranged in the valve body 1.

[0035] The valve body 1 is provided with a lifting cavity corresponding to the valve disc 5;

[0036] The lifting chamber and the side wall of the circulation channel 2 are provided with guide grooves, and the valve flap 5 is provided with guide strips 54 corresponding to the guide grooves on both sides;

[0037] The width of the guide groove is greater than the width of the guide strip 54, so as to provide movement space for the valve flap 5 when the sealing surface is worn, so that the valve flap 5 moves toward the sealing surface and fits the sealing surface to avoid internal leakage.

[0038] In the present application, a double valve flap 5 structure is provided, and a resistance spring 53 is designed between the double valve flaps 5. The resistance spring 53 is used to resist the two groups of valve flaps 5 from moving apart and continuously contacting the sealing surface provided in the valve body 1. It is used to ensure that the two valve flaps 5 are tightly attached to the sealing surface when the sealing surface becomes thin due to excessive wear and gaps appear, thereby avoiding internal leakage and improving the adjustment performance. Compared with the single valve flap design, the double valve flap plus spring is used to increase the sealing performance of the valve flap, reduce the internal leakage of the valve flap itself, reduce the sealing performance, and reduce the valve adjustment ability.

[0039] It should be noted that valves are a commonly used technical means in the prior art, and their structure is not explained and described in detail in this application. The relevant structures such as sealing rings, gaskets, limit sleeves and rivets in the prior art valves are described in detail in this application and shown in the drawings.

[0040] It should be noted that a plurality of threaded holes 51 are provided on the two groups of valve flaps 5;

[0041] A screw is disposed in the threaded hole 51 , and the screw is used to block the threaded hole 51 to adjust the throttling area at the minimum flow rate.

[0042] When the present application is used, screws can be set in the corresponding threaded holes 51 to seal them according to the needs of the site, so as to meet the pressure difference and improve the adaptability of the equipment;

[0043] It should be supplemented that a slot for inserting the valve flap 5 is provided in the valve body 1 , and sealing surfaces are provided on both side walls of the slot.

[0044] According to the above structure, sixteen threaded holes 51 distributed in a rectangular shape are arranged in the middle of the valve flap 5 for normal pressure holding. When the opening holes cannot meet the needs on site, drilling can be performed on site to set additional through holes to increase the minimum flow rate.

[0045] It is further to be added that the lower part of the valve flap 5 is provided with thirteen threaded holes 51 distributed in a triangle and corresponding to the slots;

[0046] When the valve flap 5 is fully closed, the thirteen threaded holes 51 are hidden in the slots, and when the valve flap 5 is lifted, part of the threaded holes 51 are exposed for adjusting the valve flow.

[0047] like Figure 2-3 As shown, this application has three usage states when in use:

[0048] First, the valve flap 5 is fully opened, and there is no obstruction in the flow channel 2. The valve is used as a pipeline at this time, and the flow resistance is almost zero;

[0049] Second, the valve flap 5 is completely closed, the flow channel 2 is blocked, and water can only flow through the threaded hole 51 set on the middle part of the valve flap 5. At this time, the threaded hole 51 set on the lower part of the valve flap 5 will be hidden in the slot. This state is the minimum flow state of this valve;

[0050] Third, the valve flap 5 is partially closed, the flow channel 2 is blocked, and water can flow through the threaded holes 51 set on the middle and lower parts of the valve flap 5. At this time, the threaded holes 51 set on the lower part of the valve flap 5 will be partially exposed according to the height of the valve flap 5. In this state, the throttling area can be adjusted to control the flow rate according to the needs of on-site use.

[0051] Finally, it should be noted that the actuator 4 further includes a valve stem 41 extending into the interior of the valve body 1;

[0052] The top of the valve disc 5 is provided with a clamping ring 52 corresponding to the valve stem 41, and the cross-sections of the two sets of clamping rings 52 are oppositely arranged in an L-shape, and are used for rotationally connecting with the valve stem 41;

[0053] The valve flap 5 is drivingly connected to the actuator 4 via two sets of clamping rings 52 , and the valve flap 5 is used to open and close with the driving of the actuator 4 .

[0054] It should be added that the actuator 4 is a common technical means in the prior art, which can be an electric adjustment structure or a manual adjustment structure, so as to adjust the opening and closing of the valve according to different usage requirements.

[0055] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0056] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0057] In addition, "plurality" means two or more.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure holding valve, comprising a valve body (1), a valve cover (3), an actuator (4) and a flow passage (2) arranged in the valve body (1), wherein a valve flap (5) is arranged in the valve body (1) for blocking the flow passage (2), characterized in that: The valve flaps (5) are provided in two groups, the two groups of valve flaps (5) are arranged in parallel, and a resistance spring (53) is provided between the two groups of valve flaps (5), the resistance spring (53) is used to resist the two groups of valve flaps (5) from moving apart and continuously contacting with the sealing surface provided in the valve body (1); The valve body (1) is provided with a lifting chamber corresponding to the valve disc (5); The lifting chamber and the side wall of the circulation channel (2) are provided with guide grooves, and the valve flap (5) is provided with guide strips (54) corresponding to the guide grooves on both sides; The width of the guide groove is greater than the width of the guide strip (54), so as to provide movement space for the valve flap (5) when the sealing surface is worn, so that the valve flap (5) moves toward the sealing surface and fits it, thereby avoiding internal leakage.

2. A pressure holding valve according to claim 1, characterized in that: A plurality of threaded holes (51) are provided on the two groups of valve flaps (5); A screw is arranged in the threaded hole (51), and the screw is used to block the threaded hole (51) to adjust the throttling area at the minimum flow rate.

3. A pressure holding valve according to claim 2, characterized in that: The valve body (1) is provided with a slot for inserting the valve flap (5), and sealing surfaces are provided on both side walls of the slot.

4. A pressure holding valve according to claim 2, characterized in that: The middle part of the valve flap (5) is provided with sixteen threaded holes (51) distributed in a rectangular shape for normal pressure holding.

5. The pressure holding valve according to claim 3, characterized in that: The lower part of the valve flap (5) is provided with thirteen threaded holes (51) distributed in a triangular shape and corresponding to the slots; When the valve flap (5) is fully closed, the thirteen threaded holes (51) are hidden in the slots; when the valve flap (5) is lifted, part of the threaded holes (51) are exposed for adjusting the valve flow.

6. The pressure holding valve according to claim 1, characterized in that: The actuator (4) further comprises a valve stem (41) extending into the interior of the valve body (1); A clamping ring (52) corresponding to the valve stem (41) is arranged at the top of the valve flap (5), and the two groups of clamping rings (52) have L-shaped cross sections arranged opposite to each other and are used for rotationally connecting with the valve stem (41); The valve flap (5) is transmission-connected to the actuator (4) via two sets of clamping rings (52), and the valve flap (5) is used to open and close in response to the driving of the actuator (4).

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