Stop valve with pressure difference adjusting function

Abstract

The stop valve with the pressure difference adjusting function comprises a valve body structure, a pressure difference adjusting structure is fixedly installed at the bottom of the valve body structure in an embedded mode, the valve body structure comprises a valve body, a liquid outlet hole is formed in the bottom of the valve body in a penetrating mode, and a first sealing block is rotatably installed in the valve body through a hand wheel threaded rod. And meanwhile, a sawtooth groove is formed in the bottom of the first sealing block, the pressure difference adjusting structure comprises a cavity shell with a guide groove formed in the bottom, the cavity shell wraps the liquid outlet hole and is embedded and fixed to the bottom of the valve body, a spring air bag is fixedly installed in the cavity shell, and an arc-shaped plate is fixedly installed at the bottom of the spring air bag. And meanwhile, a first cavity rod is fixedly installed at the bottom of the arc-shaped plate, a liquid outlet groove is formed in the surface of the first cavity rod in a penetrating mode, and a second cavity rod with another liquid outlet groove is fixed to the upper portion of the arc-shaped plate.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically a gate valve with differential pressure regulation function. Background Technology

[0002] A gate valve, also known as a stop valve, is a type of forced-seal valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force a leak-proof seal. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the frictional force of the valve stem and packing, plus the thrust generated by the pressure of the medium. The force required to close the valve is greater than the force required to open it, so the valve stem diameter must be larger; otherwise, the valve stem may bend. During use, pressure fluctuations in the pipeline can cause flow deviations, resulting in a pressure difference across the gate valve and affecting its normal operation. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing a shut-off valve with differential pressure regulation function, so as to solve the problem that the shut-off valve mentioned in the background technology will cause flow deviation in the pipeline due to pressure fluctuation during use, resulting in a pressure difference at both ends of the shut-off valve and affecting the normal use of the shut-off valve.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a shut-off valve with differential pressure regulation function, comprising a valve body structure, wherein a differential pressure regulation structure is embedded and fixedly installed at the bottom of the valve body structure;

[0005] The valve body structure includes a valve body with a liquid outlet hole through the bottom, and a first sealing block is rotatably installed inside the valve body via a handwheel threaded rod. The bottom of the first sealing block is provided with a serrated groove.

[0006] The differential pressure regulating structure includes a cavity shell with a guide groove at the bottom, and the cavity shell is embedded and fixed to the bottom of the valve body, enclosing the liquid outlet hole.

[0007] By adopting the above technical solution, the first sealing block is set to achieve the function of opening and lifting adjustment.

[0008] Preferably, a spring airbag is fixedly installed inside the cavity shell, and an arc-shaped plate is fixedly installed at the bottom of the spring airbag. At the same time, a first cavity rod is fixedly installed at the bottom of the arc-shaped plate, and a liquid outlet groove is opened through the surface of the first cavity rod.

[0009] By adopting the above technical solution, the spring airbag is used to achieve elastic adjustment.

[0010] Preferably, a second cavity rod with another liquid outlet groove is fixed above the arc-shaped plate, and the second cavity rod slides through a partition plate with a guide groove, while the partition plate is welded and fixed to the bottom of the valve body.

[0011] By adopting the above technical solution, the second cavity rod is used to open and guide the flow.

[0012] Preferably, an L-shaped plate is fixedly installed above the second cavity rod, and the L-shaped plate is adjustable in height inside the partition. A connecting rod is fixedly installed above the spring airbag, and a second sealing block is fixedly installed above the connecting rod. At the same time, a serrated block is fixedly installed above the second sealing block.

[0013] By adopting the above technical solution, the serrated blocks are designed to achieve a locking and fitting effect.

[0014] Preferably, the cavity shell has an overall "open" structure.

[0015] By adopting the above technical solution, the hollow shell is used to enclose and fix the device.

[0016] Preferably, one set of arc-shaped plates is provided, and the arc-shaped plates are symmetrically arranged about the axis of the spring airbag.

[0017] By adopting the above technical solution, the force can be adjusted by setting up the arc-shaped plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the shut-off valve with differential pressure regulation function,

[0019] (1) This case solves the problem of flow deviation caused by pressure fluctuation in the pipeline during the use of the gate valve, which leads to a pressure difference between the two ends of the gate valve and affects the normal use of the gate valve by setting a differential pressure adjustment structure. When a pressure difference occurs between the two ends of the valve body, the liquid inside the valve body enters the cavity shell or the partition. When the pressure on the left side of the valve body is high, the liquid enters the cavity shell through the liquid outlet and squeezes the arc plate. When the arc plate is squeezed, it drives the connecting rod and the second sealing block to move synchronously. When the second sealing block and the first sealing block are in contact, when the pressure on the right side of the valve body is high, the liquid enters the partition through the liquid outlet and forces the L arc plate to move downward. When the L arc plate moves downward, it drives the second sealing block and the first sealing block to separate. By changing the distance of the lifting and lowering interval of the second sealing block, the pressure difference inside the valve body is changed, while maintaining the pressure balance inside the valve body.

[0020] (2) By using the first cavity rod, the liquid outlet groove and the second cavity rod in the differential pressure adjustment structure, the problem of liquid accumulation when liquid enters the cavity shell and the partition is solved. When the first cavity rod moves downward, the liquid outlet groove is used to discharge the liquid inside the cavity shell, and when the second cavity rod moves upward, the liquid between the partitions is discharged into the cavity shell, so that the liquid inside the cavity shell can be discharged together. Attached Figure Description

[0021] Figure 1 This is a frontal cross-sectional view of the present invention.

[0022] Figure 2 This is a schematic diagram of the valve body structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the differential pressure adjustment structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the first cavity rod and liquid outlet groove of this utility model.

[0025] In the diagram: 1. Valve body structure; 101. Valve body; 102. Liquid outlet; 103. Handwheel threaded rod; 104. First sealing block; 105. Serrated groove; 2. Differential pressure adjustment structure; 201. Cavity shell; 202. Guide groove; 203. Spring air bladder; 204. Arc plate; 205. First cavity rod; 206. Liquid outlet groove; 207. Second cavity rod; 208. Partition plate; 209. L-shaped arc plate; 2010. Connecting rod; 2011. Second sealing block; 2012. Serrated block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-4 This utility model provides a technical solution: a shut-off valve with differential pressure regulation function, such as... Figure 1 and Figure 2 As shown, it includes a valve body structure 1, which includes a valve body 101 with a liquid outlet hole 102 through the bottom, and a first sealing block 104 is rotatably installed inside the valve body 101 via a handwheel threaded rod 103. At the same time, a serrated groove 105 is provided at the bottom of the first sealing block 104.

[0028] like Figure 3 and Figure 4As shown, a differential pressure regulating structure 2 is embedded and fixedly installed at the bottom of the valve body structure 1. The differential pressure regulating structure 2 includes a cavity shell 201 with a guide groove 202 at the bottom. The cavity shell 201 is embedded and fixedly installed at the bottom of the valve body 101, covering the liquid outlet hole 102. The overall shape of the cavity shell 201 is an "open" structure. When the overall shape of the above components is an "open" structure, it not only reflects the enclosure of the above components but also the openness of the above components. Furthermore, when the overall shape of the above components is an "open" structure, it reflects the practicality of the above components installation and the enclosure, protection, and fixed installation.

[0029] Furthermore, in the above scheme, a spring airbag 203 is fixedly installed inside the cavity shell 201, and an arc-shaped plate 204 is fixedly installed at the bottom of the spring airbag 203. One set of arc-shaped plates 204 is provided, and the arc-shaped plates 204 are symmetrically arranged about the axis of the spring airbag 203. When the above components are provided in a set of two pieces, it not only reflects the symmetry of the above components, but also reflects the driving and adjustment of the above components. Moreover, when the above components are provided in a set of two pieces, it reflects the practicality of the installation and setting of the above components. At the same time, a first cavity rod 205 is fixedly installed at the bottom of the arc-shaped plate 204, and a liquid outlet groove 206 is opened through the surface of the first cavity rod 205.

[0030] Furthermore, in the above scheme, a second cavity rod 207 with another liquid outlet groove 206 is fixed above the arc plate 204, and the second cavity rod 207 slides through the partition plate 208 with the same guide groove 202. At the same time, the partition plate 208 is welded and fixed to the bottom of the valve body 101. An L-shaped arc plate 209 is fixedly installed above the second cavity rod 207, and the L-shaped arc plate 209 is adjustable in height inside the partition plate 208. A connecting rod 2010 is fixedly installed above the spring airbag 203, and a second sealing block 2011 is fixedly installed above the connecting rod 2010. At the same time, a serrated block 2012 is fixedly installed above the second sealing block 2011.

[0031] In the above scheme, when a pressure difference occurs at both ends of the valve body 101, the liquid inside the valve body 101 enters the cavity housing 201 or the partition 208 respectively. When the pressure on the left side of the valve body 101 is high, the liquid enters the cavity housing 201 through the liquid outlet 102 and squeezes the arc-shaped plate 204. When the arc-shaped plate 204 is squeezed, it causes the connecting rod 2010 and the second sealing block 2011 to move synchronously. The second sealing block 2011 and the first sealing block 104 are in contact. When the pressure on the right side of the valve body 101 is high, the liquid flows through... The liquid enters the partition 208 through the outlet hole 102 and exerts force on the L-shaped plate 209 to move downward. When the L-shaped plate 209 moves downward, it causes the second sealing block 2011 to separate from the first sealing block 104. By changing the lifting and lowering distance of the second sealing block 2011, the pressure difference inside the valve body 101 is changed, while maintaining the pressure balance inside the valve body 101. When the valve body 101 is in normal use, the handwheel threaded rod 103 is rotated to adjust the lifting and lowering of the first sealing block 104 to ensure the normal operation of the valve body 101.

[0032] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stop valve having a pressure differential regulating function, comprising a valve body structure (1), characterized in that: The valve body structure (1) bottom inlay fixed installation has pressure difference adjusting structure (2); The valve body structure (1) includes the valve body (101) that bottom penetrates and sets up liquid outlet hole (102), and the first sealing block (104) is rotatably installed in the valve body (101) through hand wheel screw rod (103), and the sawtooth groove (105) is set up in the bottom of first sealing block (104); The pressure difference adjusting structure (2) includes the cavity shell (201) that bottom sets up guide slot (202), and the cavity shell (201) inlay is fixed in the bottom of valve body (101) and is wrapped out liquid hole (102).

2. The stop valve having a pressure differential regulating function according to claim 1, characterized in that: The cavity shell (201) is fixedly installed with spring air bag (203) inside, and the arc plate (204) is fixedly installed at the bottom of spring air bag (203), and the first cavity rod (205) is fixedly installed at the bottom of arc plate (204), the surface of first cavity rod (205) is set up with liquid outlet groove (206).

3. The stop valve having a pressure differential regulating function according to claim 2, characterized in that: The arc plate (204) is fixed with the second cavity rod (207) with another liquid outlet groove (206) above, and the second cavity rod (207) is slidingly connected through the baffle (208) with guide slot (202), and the baffle (208) is welded and fixed on the bottom of valve body (101).

4. The stop valve having a pressure differential regulating function according to claim 3, characterized in that: The L arc plate (209) is fixedly installed above the second cavity rod (207), and the L arc plate (209) is adjusted in the baffle (208), the connecting rod (2010) is fixedly installed above the spring air bag (203), and the second sealing block (2011) is fixedly installed above the connecting rod (2010), and the sawtooth block (2012) is fixedly installed above the second sealing block (2011).

5. The stop valve having a pressure differential regulating function according to claim 1, characterized in that: The cavity shell (201) is arranged as "open” structure.

6. The stop valve having a pressure differential regulating function according to claim 2, characterized in that: There are 1 set of arc plates (204), and the arc plate (204) is symmetrically arranged about the axis of spring air bag (203).

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