Self-operated regulating valve

Abstract

The utility model relates to the technical field of pressure regulating valves, in particular to a self-operated regulating valve which comprises a valve body, a discharge end is fixed on one side of the valve body, an inlet end is fixed on the other side of the valve body, a valve seat is fixed in the valve body, a valve rod is inserted in the valve body, and a valve rod is fixed on the valve rod. A valve hole communicated with two inner cavities of the valve body is formed in the center of the valve seat, a valve plate is detachably connected and fixed to the end, inserted into the valve hole, of the valve rod, the valve rod and the valve body are installed in a sliding fit mode, and a packing sealing mechanism is fixed to the position, corresponding to the installation position of the valve rod, of the outer wall of the valve body. The valve has the beneficial effects that the valve rod is mechanically sealed through the packing sealing mechanism, and the sealing effect can be improved when the valve rod moves; the direct flow channel is formed in the valve seat, the manual valve is installed, the direct flow channel is controlled to be opened and closed through the manual valve, and normal circulation of fluid can be guaranteed conveniently when the pressure adjusting mechanism breaks down.

Description

A self-regulating valve Technical Field

[0001] This utility model relates to the field of pressure regulating valve technology, and in particular to a self-operated regulating valve. Background Technology

[0002] Self-operated pressure regulating valves are widely used in industrial pipeline systems to automatically regulate fluid pressure and keep it within a set range.

[0003] Chinese patent application number CN202223246090.1 discloses a self-regulating pressure regulating valve, including a regulating valve body with an inlet and an outlet at both ends. The regulating valve body has an arc-shaped flow baffle inside, with a water passage hole in the center of each baffle. A valve seat is fixedly installed on the top of the regulating valve body, and a valve stem extends through the top of the regulating valve body. A valve core is fixedly connected to the lower end of the valve stem, and the valve core is adapted to the water passage hole. An regulating column is fixedly installed on the top of the regulating valve body, with a constant pressure component inside the regulating column. A diaphragm box is fixedly installed on the top of the regulating column, with a diaphragm fixed inside the diaphragm box. A top plate is provided inside the diaphragm box, and the top plate abuts against the bottom of the diaphragm. A filter component is fixedly installed at one end of the inlet.

[0004] If the pressure regulating mechanism malfunctions during the pressure adjustment process, it will cause the valve body to close, preventing the fluid from passing through normally and affecting the normal operation of the entire process. Summary of the Invention

[0005] This utility model proposes a self-regulating valve to solve the above-mentioned problems.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A self-operated regulating valve includes a valve body with a discharge end fixed on one side and an inlet end fixed on the other side. A valve seat is fixed inside the valve body, dividing the internal cavity of the valve body into two chambers. The discharge end and the inlet end are respectively connected to the two chambers inside the valve body. A valve stem is inserted into the valve body. A valve hole communicating between the two chambers of the valve body is formed in the center of the valve seat. A valve plate is detachably connected to one end of the valve stem inserted into the valve hole. The valve stem is slidably fitted to the valve body. A packing sealing mechanism is fixed on the outer wall of the valve body corresponding to the installation position of the valve stem. A pressure regulating mechanism that is throttle-connected to the valve stem is fixed at the upper end of the valve body. A direct current channel communicating between the two chambers of the valve body is formed on the valve seat. A manual valve for blocking the direct current channel is rotatably installed on the side wall of the valve body.

[0008] Furthermore, the diameter of the DC channel does not exceed the diameter of the valve orifice.

[0009] Furthermore, the packing sealing mechanism includes a bushing formed on the valve body, the valve stem is slidably installed in the bushing, a pressure ring nested on the outer wall of the valve stem is slidably installed in the bushing, packing is fixed inside the pressure ring, a pressure spring is provided outside the pressure ring, a pressure cap that restricts the position of the pressure spring is threaded onto the outer end of the bushing, and sealing rings are fixed on both the inner and outer circles of the pressure ring.

[0010] Furthermore, the pressure regulating mechanism includes at least two guide screws vertically fixed to the end face of the valve body. A slide plate is slidably mounted on the guide screws, and a nut is installed on the guide screws to limit the position of the slide plate. A diaphragm box is fixed on the slide plate, and a diaphragm is fixed inside the diaphragm box. A connecting slide rod is fixed to the lower surface of the diaphragm. The connecting slide rod is slidably fitted with the slide plate and is positioned directly opposite the valve stem. A first spring is installed between the connecting slide rod and the valve stem. A pressure regulating pipe is connected to the upper end of the diaphragm box, and the other end of the diaphragm box is connected to the inner cavity of the inlet end.

[0011] Furthermore, a pressure regulating valve is fixed on the pressure regulating pipe.

[0012] Furthermore, a second spring cup for installing the first spring is fixed to one end of the connecting slide rod near the valve stem, and a first spring cup for installing the first spring is fixed to one end of the valve stem near the connecting slide rod.

[0013] The beneficial effects of this utility model by adopting the above technical solution are as follows: the mechanical sealing of the valve stem by the packing sealing mechanism can improve the sealing effect when the valve stem moves; by opening a DC channel on the valve seat and installing a manual valve, the opening and closing of the DC channel can be controlled by the manual valve, which facilitates the normal flow of fluid when the pressure regulating mechanism fails. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 is a perspective view of this utility model;

[0016] Figure 2 is a front view of this utility model;

[0017] Figure 3 is a first sectional view of this utility model;

[0018] Figure 4 is a second sectional view of this utility model;

[0019] Figure 5 is a top view of this utility model;

[0020] Figure 6 is a schematic diagram of the packing sealing mechanism of this utility model.

[0021] The annotations in the attached figures are explained as follows:

[0022] 1. Valve body; 2. Valve seat; 3. Valve plate; 4. Valve stem; 41. First spring cup; 5. Valve hole; 6. Discharge end; 7. Inlet end; 8. Packing sealing mechanism; 81. Bushing; 82. Packing; 83. Pressure ring; 84. Compression spring; 85. Pressure cover; 9. Pressure regulating mechanism; 91. Guide screw; 92. Slide plate; 93. Diaphragm box; 94. Diaphragm; 95. Connecting slide rod; 96. Pressure regulating pipe; 97. Pressure regulating valve; 98. Second spring cup; 99. First spring; 10. Direct current channel; 11. Manual valve. Detailed Implementation

[0023] 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.

[0024] As shown in Figures 1-6, a self-operated regulating valve includes a valve body 1. A discharge end 6 is fixed to one side of the valve body 1, and an inlet end 7 is fixed to the other side. A valve seat 2 is fixed inside the valve body 1, dividing the inner cavity of the valve body 1 into two chambers. The discharge end 6 and the inlet end 7 are respectively connected to the two chambers inside the valve body 1. A valve stem 4 is inserted into the valve body 1. A valve hole 5 connecting the two inner cavities of the valve body 1 is formed in the center of the valve seat 2. One end of the valve stem 4 inserted into the valve hole 5 is detachably connected to and fixed to a valve plate 3. The valve stem 4 is slidably fitted to the valve body 1. A corresponding valve plate is mounted on the outer wall of the valve body 1. A packing sealing mechanism 8 is fixed at the installation position of valve 4. A pressure regulating mechanism 9 connected to valve stem 4 is fixed at the upper end of valve body 1. The pressure and flow rate in the pipeline are automatically regulated by the pressure regulating mechanism 9. A direct current channel 10 connecting two chambers in valve body 1 is formed on valve seat 2. The diameter of the direct current channel 10 does not exceed the diameter of valve hole 5. A manual valve 11 is rotatably installed on the side wall of valve body 1 to block the direct current channel 10. The opening and closing of the direct current channel 10 is regulated by the manual valve 11, so that the normal flow of the packaged fluid can be manually opened when the pressure regulating mechanism 9 malfunctions.

[0025] In this embodiment, the packing sealing mechanism 8 includes a bushing 81 formed on the valve body 1, a valve stem 4 slidably installed in the bushing 81, a pressure ring 83 nested on the outer wall of the valve stem 4 slidably installed in the bushing 81, a packing 82 fixed inside the pressure ring 83, a pressure spring 84 provided outside the pressure ring 83, a pressure cap 85 that restricts the position of the pressure spring 84 is threadedly installed at the outer end of the bushing 81, and sealing rings are fixed on both the inner and outer circles of the pressure ring 83.

[0026] In this embodiment, the pressure regulating mechanism 9 includes at least two guide screws 91 vertically fixed to the end face of the valve body 1. A slide plate 92 is slidably mounted on the guide screws 91. A nut that limits the position of the slide plate 92 is installed on the guide screws 91. A diaphragm box 93 is fixed on the slide plate 92. A diaphragm 94 is fixed inside the diaphragm box 93. A connecting slide rod 95 is fixed on the lower surface of the diaphragm 94. The connecting slide rod 95 is slidably fitted with the slide plate 92. The connecting slide rod 95 is positioned directly opposite the valve stem 4. A first spring 99 is installed between the connecting slide rod 95 and the valve stem 4. A pressure regulating pipe 96 is connected to the upper end of the diaphragm box 93. The other end of the diaphragm box 93 is connected to the inner cavity of the inlet end 7. A pressure regulating valve 97 is fixed on the pressure regulating pipe 96. A second spring cup 98, on which the first spring 99 is installed, is fixed at one end of the connecting slide rod 95 near the valve stem 4. A first spring cup 41, on which the first spring 99 is installed, is fixed at one end of the valve stem 4 near the connecting slide rod 95. The fluid in the pipeline flows into the diaphragm box 93 through the pressure regulating pipe 96. When the pressure at the inlet end 7 is high, the diaphragm 94 moves down, causing the valve plate 3 to move down to accelerate the flow of fluid and relieve pressure. When the pressure at the outlet end is high, the valve plate 3 moves up to reduce the flow of fluid, thereby achieving automatic pressure regulation without external power. The distance between the slide plate 92 and the valve body 1 can be adjusted by the nut installed on the guide screw 91, thereby adjusting the compression of the first spring 99 and thus adjusting the accuracy of pressure regulation.

[0027] The working principle of this utility model is as follows: When the pressure in the discharge end 6 and the inlet end 7 changes during use, the pressure difference will cause the connecting slide rod 95 to move up and down. When the connecting slide rod 95 moves up and down, it will push the valve rod 4 up and down through the first spring 99, thereby controlling the distance between the valve plate 3 and the valve hole 5 and controlling the flow rate. When the pressure regulating mechanism 9 malfunctions and the valve plate 3 cannot move down to open the valve hole 5, the DC channel 10 can be opened by twisting the manual valve 11, and the packaging fluid can flow normally through the valve body 1.

[0028] Components not described in detail in this article are existing technologies.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-regulating valve, comprising a valve body (1), a discharge end (6) fixed on one side of the valve body (1), an inlet end (7) fixed on the other side of the valve body (1), a valve seat (2) fixed inside the valve body (1), the valve seat (2) dividing the inner cavity of the valve body (1) into two chambers, the discharge end (6) and the inlet end (7) respectively connected to the two chambers inside the valve body (1), a valve stem (4) inserted into the valve body (1), a valve hole (5) communicating with the two inner cavities of the valve body (1) formed in the center of the valve seat (2), a valve plate (3) is detachably fixed to one end of the valve stem (4) inserted into the valve hole (5), and the valve stem (4) is slidably fitted with the valve body (1), characterized in that: A packing sealing mechanism (8) is fixed on the outer wall of the valve body (1) at the installation position corresponding to the valve stem (4). A pressure regulating mechanism (9) connected to the valve stem (4) is fixed at the upper end of the valve body (1). A DC channel (10) connecting the two chambers inside the valve body (1) is formed on the valve seat (2). A manual valve (11) that blocks the DC channel (10) is rotatably installed on the side wall of the valve body (1).

2. The self-operated regulating valve according to claim 1, characterized in that: The diameter of the DC channel (10) does not exceed the diameter of the valve hole (5).

3. A self-operated regulating valve according to claim 1, characterized in that: The packing sealing mechanism (8) includes a bushing (81) formed on the valve body (1), the valve stem (4) is slidably installed in the bushing (81), a pressure ring (83) nested on the outer wall of the valve stem (4) is slidably installed in the bushing (81), packing (82) is fixed inside the pressure ring (83), a pressure spring (84) is provided on the outer side of the pressure ring (83), and a pressure cap (85) that restricts the position of the pressure spring (84) is threadedly installed at the outer end of the bushing (81), and sealing rings are fixed on both the inner and outer circles of the pressure ring (83).

4. A self-operated regulating valve according to claim 1, characterized in that: The pressure regulating mechanism (9) includes at least two guide screws (91) vertically fixed to the end face of the valve body (1). A slide plate (92) is slidably mounted on the guide screw (91). A nut that limits the position of the slide plate (92) is installed on the guide screw (91). A diaphragm box (93) is fixed on the slide plate (92). A diaphragm (94) is fixed inside the diaphragm box (93). A connecting slide rod (95) is fixed on the lower surface of the diaphragm (94). The connecting slide rod (95) is slidably fitted with the slide plate (92). The connecting slide rod (95) is positioned opposite the valve stem (4). A first spring (99) is installed between the connecting slide rod (95) and the valve stem (4). A pressure regulating pipe (96) is connected to the upper end of the diaphragm box (93). The other end of the diaphragm box (93) is connected to the inner cavity of the inlet end (7).

5. A self-operated regulating valve according to claim 4, characterized in that: A pressure regulating valve (97) is fixed on the pressure regulating pipe (96).

6. A self-operated regulating valve according to claim 4, characterized in that: The connecting slide rod (95) is fixed with a second spring cup (98) on one end near the valve stem (4), and the valve stem (4) is fixed with a first spring cup (41) on one end near the connecting slide rod (95).

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