Mechanical pressure reducing valve group

Abstract

The utility model discloses a mechanical pressure reducing valve group, and relates to the technical field of pressure reducing valves. The pressure reducing valve comprises a pressure reducing valve body and a valve rod arranged in the pressure reducing valve body in a sliding mode, and further comprises a shell which is installed on the top of the pressure reducing valve body and covers the valve rod, and a membrane is fixed between the shell and the pressure reducing valve body and connected with the outer side of the valve rod. The first spring and the second springs jointly bear the task of pressure adjustment, even if the first spring is damaged, the second springs can still maintain the basic function of the pressure reducing valve body, the system pressure is prevented from being out of control, the second springs jointly share the load of the first spring, the first spring is not prone to damage, and the service life of the pressure reducing valve body is prolonged. And the overall service life of the pressure reducing valve can be prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of pressure reducing valves, in particular to a mechanical pressure reducing valve group. BACKGROUND

[0002] The pressure reducing valve is used for reducing the inlet pressure to a required outlet pressure through the cooperation of a spring, a lever, a diaphragm, a connecting rod and a gear, and the above components rely on the energy of the medium itself to transmit force or movement through physical contact, so that the pressure detection, adjustment and stabilization of the outlet pressure are realized.

[0003] The traditional pressure reducing valve usually adopts a single spring to realize pressure adjustment, and the design is simple, but there are obvious limitations in actual application, that is, when the only spring is damaged or fails, the pressure reducing valve will completely lose the pressure reducing function, resulting in uncontrolled system pressure. In order to reasonably improve the above problem, the application provides a mechanical pressure reducing valve group.

[0004] The application aims to solve the technical problem that the traditional pressure reducing valve usually adopts a single spring to realize pressure adjustment, and the design is simple, but there are obvious limitations in actual application, that is, when the only spring is damaged or fails, the pressure reducing valve will completely lose the pressure reducing function, resulting in uncontrolled system pressure.

[0005] In order to achieve the above purpose, the application specifically adopts the following technical scheme:

[0006] The mechanical pressure reducing valve group comprises a pressure reducing valve body and a valve rod slidingly arranged in the pressure reducing valve body, and further comprises:

[0007] A shell is mounted on the top of the pressure reducing valve body and covers the valve rod, a diaphragm is fixed between the shell and the pressure reducing valve body, and the diaphragm is connected to the outer side of the valve rod;

[0008] A push plate is arranged at the top end of the valve rod, a first spring is arranged on the top of the push plate, and a driving member is arranged on the top of the shell and used for driving the compression of the first spring;

[0009] A cylindrical groove is annularly arranged on the inner wall of the shell, and a second spring is arranged in the cylindrical groove, a push block is slidingly matched with the cylindrical groove, and the end of the second spring is abuttingly connected to the push block, and the push block is hingedly connected to the push plate through a hinge plate.

[0010] Further, an annular block is arranged on the outer side of the shell, and the cylindrical groove is arranged in the annular block.

[0011] Further, the end of the cylindrical groove is obliquely provided with a communication groove for accommodating the hinge plate.

[0012] Further, a plurality of cover plates are detachably mounted outside the annular block, and the plurality of cover plates cover the ends of the plurality of cylindrical grooves respectively.

[0013] Further, a cylindrical block is arranged on the cover plate, and the cylindrical block and the push block are respectively matched with the pistons at the two ends of the cylindrical groove.

[0014] Further, a lead screw is rotatably mounted on the cover plate, one end of the lead screw is provided with a prismatic groove, and the other end is threadedly matched with the cylindrical block.

[0015] Further, the driving member comprises a handle rotatably mounted on the top of the shell, a resisting block is threadedly matched with the bottom end of the handle, and the resisting block is slidably matched with the shell and abuts against the top end of the first spring.

[0016] Further, the top end of the shell is provided with a sliding groove, and the resisting block is matched with the piston of the sliding groove.

[0017] Further, the top end of the push plate is provided with a sleeve, the bottom end of the first spring is arranged in the sleeve, the bottom end of the resisting block is provided with a plug column, and the plug column is inserted into the top end of the first spring.

[0018] The beneficial effects of the present application are as follows:

[0019] The first spring and the plurality of second springs jointly undertake the task of pressure regulation, even if the first spring is damaged, the plurality of second springs can still maintain the basic function of the pressure reducing valve body, avoid the system pressure out of control, and through the plurality of second springs jointly sharing the load of the first spring, the first spring is not easy to be damaged, the overall service life of the pressure reducing valve can be prolonged, and the present application has practicality. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective view of the present application;

[0021] Figure 2 is a structural half-section view of the present application; Figure 1

[0022] Figure 3 is a side view of the present application; Figure 2

[0023] Figure 4 is an enlarged view of A of the present application; Figure 3

[0024] ​​​Reference signs: 1, pressure reducing valve body; 2, valve stem; 3, shell; 4, diaphragm; 5, push plate; 6, first spring; 7, driving piece; 701, handle; 702, abutment; 8, cylindrical groove; 9, second spring; 10, push block; 11, hinged plate; 12, annular block; 13, communication groove; 14, cover plate; 15, cylindrical block; 16, screw rod; 17, prism slot; 18, sliding groove; 19, sleeve; 20, insertion column. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0026] As shown in the drawings, one embodiment of the mechanical pressure reducing valve group provided by the present application comprises a pressure reducing valve body 1 and a valve stem 2 slidingly arranged in the pressure reducing valve body 1. Here, as shown in the drawings, it is the valve core structure of the existing pressure reducing valve, and the opening size of the pressure reducing valve body 1 can be controlled by driving the valve stem 2 to move up and down. The pressure reducing valve group further comprises: Figures 1-4 Figure 2

[0027] A shell 3 is installed at the top of the pressure reducing valve body 1. The shell 3 is in communication with the pressure reducing valve body 1 and covers the valve stem 2. A diaphragm 4 is fixed between the shell 3 and the pressure reducing valve body 1. The diaphragm 4 is connected to the outer side of the valve stem 2. The working principle of the diaphragm 4 is consistent with that of the existing pressure reducing valve. That is, when the pressure rises, the pressure generated by the medium in the pressure reducing valve body 1 acts on the diaphragm 4. At this time, the diaphragm 4 deforms upwards and drives the valve stem 2 to move upwards, thereby increasing the opening angle of the pressure reducing valve body 1, releasing the excess pressure. When the pressure decreases, the diaphragm 4 resets and drives the valve stem 2 to move downwards, thereby reducing the opening angle of the pressure reducing valve body 1 and reducing the fluid outflow. Finally, when the pressure is stable, the diaphragm 4 is in a balanced state, the opening angle of the pressure reducing valve body 1 remains unchanged, and the pressure of the pressure reducing valve body 1 is stable at the set value.

[0028] A push plate 5 is constructed at the top end of the valve stem 2. The top of the push plate 5 is provided with a first spring 6. The top of the shell 3 is provided with a driving piece 7 for driving the compression of the first spring 6. By compressing the first spring 6 through the driving piece 7, the spring force of the first spring 6 can be adjusted to set and maintain the outlet pressure of the pressure reducing valve body 1, ensure the pressure stability, and quickly respond to pressure changes to maintain the normal operation of the pressure reducing valve body 1.

[0029] Cylindrical grooves 8 are annularly distributed on the inner wall of the shell 3, and each of the cylindrical grooves 8 is provided with a second spring 9. Push blocks 10 are slidingly fitted in the cylindrical grooves 8 and abut against the end portions of the second springs 9. The push blocks 10 are hingedly connected to the push plate 5 through hinged plates 11. Here, as shown in the drawings, the hinged plates 11 are annularly distributed on the push plate 5, and the push blocks 10 are hingedly connected to the hinged plates 11. Figure 3 ​​As shown, when the diaphragm 4 drives the valve stem 2 to move upwards and compresses the first spring 6, the push plate 5 can push the push block 10 to slide through the hinged plate 11 and compress the plurality of second springs 9. By combining the first spring 6 with the plurality of second springs 9, more precise pressure adjustment can be achieved to adapt to more complex working conditions.

[0030] The present application uses the first spring 6 and the plurality of second springs 9 to jointly undertake the task of pressure adjustment. Even if the first spring 6 is damaged, the plurality of second springs 9 can still maintain the basic function of the pressure reducing valve body 1, avoid system pressure out of control, and share the load of the first spring 6 through the plurality of second springs 9, so that the first spring 6 is not easy to be damaged, the overall service life of the pressure reducing valve can be prolonged, and the present application has practicality.

[0031] As shown in the Figures 1-3 In some embodiments, an annular block 12 is configured outside the shell 3, and the cylindrical groove 8 is arranged in the annular block 12. The cylindrical groove 8 extends from the inner wall of the shell 3 towards the outside of the shell 3, that is, the cylindrical groove 8 protrudes outside the shell 3. By arranging the cylindrical groove 8 in the annular block 12, the annular block 12 can protect the cylindrical groove 8 from deformation under external force.

[0032] As shown in the Figures 2-4 In some embodiments, the end of the cylindrical groove 8 is inclined and configured with a communication groove 13 for accommodating the hinged plate 11. When the push plate 5 moves upwards and drives the push block 10 to move through the hinged plate 11, the hinged plate 11 can slide in the communication groove 13. This design allows the push block 10 to be shorter in length, thereby increasing the stroke of the push block 10 in a limited space.

[0033] As shown in the Figures 1-4 In some embodiments, a plurality of cover plates 14 are detachably mounted outside the annular block 12. The cover plates 14 are detachably connected to the annular block 12 through a bolt assembly, and the plurality of cover plates 14 respectively cover the ends of the plurality of cylindrical grooves 8. By detaching the cover plates 14, the second springs 9 in the cylindrical grooves 8 can be replaced.

[0034] As shown in the Figure 4 In some embodiments, a cylindrical block 15 is arranged on the cover plate 14, and the cylindrical block 15 and the push block 10 are respectively matched with the pistons at both ends of the cylindrical groove 8. After the cover plate 14 is installed, the cylindrical block 15 can block the end of the cylindrical groove 8, and the push block 10 can block the end of the cylindrical groove 8. That is, the moving push block 10 can compress the air in the cylindrical groove 8, which can improve the elasticity of the second spring 9 to a certain extent.

[0035] As shown in the Figure 4As shown, in some embodiments, a lead screw 16 is rotatably mounted on the cover plate 14, and one end of the lead screw 16 is constructed with a prism groove 17. The prism groove 17 is located on the outside of the cover plate 14. The lead screw 16 can be rotated through the prism groove 17 using a prism wrench. The other end is threadedly engaged with the cylindrical block 15. By driving the lead screw 16 to rotate, the cylindrical block 15 can be driven to slide in the cylindrical groove 8, thereby compressing the second spring 9 and further improving the elasticity of the second spring 9.

[0036] like Figure 3 As shown, in some embodiments, the driving member 7 includes a handle 701 rotatably mounted on the top of the housing 3. The bottom end of the handle 701 is threaded with a stop 702, and the stop 702 is slidably engaged with the housing 3 and abuts against the top end of the first spring 6. By rotating the handle 701, the stop 702 can be driven to slide inside the housing 3, thereby compressing the first spring 6 and improving the elasticity of the first spring 6.

[0037] like Figure 3 As shown, in some embodiments, the top of the housing 3 is constructed with a groove 18, and the abutment 702 is piston-engaged with the groove 18. During the use of the pressure reducing valve body 1, the diaphragm 4 may be damaged. At this time, the medium in the pressure reducing valve body 1 will flow into the housing 3. Since the pusher 10 is piston-engaged with the cylindrical groove 8 and the abutment 702 is piston-engaged with the groove 18, the medium is not easy to leak from the housing 3.

[0038] like Figure 2 As shown, in some embodiments, the top of the push plate 5 is provided with a sleeve 19, the bottom of the first spring 6 is provided in the sleeve 19, and the bottom of the abutment block 702 is provided with a plug 20. The plug 20 is inserted into the top of the first spring 6. Through the cooperation between the sleeve 19 and the plug 20, the compression of the first spring 6 can be guided, making it less prone to bending and deformation.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mechanical pressure-reducing valve assembly, comprising a pressure-reducing valve body (1) and a valve stem (2) slidably disposed within the pressure-reducing valve body (1), characterized in that, Also includes: A housing (3) is installed on top of the pressure reducing valve body (1) and covers the valve stem (2). A diaphragm (4) is fixed between the housing (3) and the pressure reducing valve body (1). The diaphragm (4) is connected to the outside of the valve stem (2). A push plate (5) is constructed at the top of the valve stem (2). A first spring (6) is provided at the top of the push plate (5). A drive member (7) is provided at the top of the housing (3) for driving the first spring (6) to compress. The cylindrical grooves (8) are distributed in a ring on the inner wall of the housing (3), and each of them is provided with a second spring (9). Each of the cylindrical grooves (8) has a push block (10) that slides in and abuts against the end of the second spring (9). Each push block (10) is hinged to the push plate (5) through a hinge plate (11).

2. The mechanical pressure reducing valve assembly according to claim 1, characterized in that, The outer side of the shell (3) is provided with an annular block (12), and the cylindrical groove (8) is provided in the annular block (12).

3. The mechanical pressure reducing valve assembly according to claim 2, characterized in that, The cylindrical groove (8) has an inclined end with a connecting groove (13) for accommodating the hinge plate (11).

4. The mechanical pressure reducing valve assembly according to claim 3, characterized in that, Multiple cover plates (14) are detachably installed on the outer side of the annular block (12), and the multiple cover plates (14) respectively cover the ends of multiple cylindrical grooves (8).

5. The mechanical pressure reducing valve assembly according to claim 4, characterized in that, The cover plate (14) is provided with a cylindrical block (15), and the cylindrical block (15) and the push block (10) respectively cooperate with the pistons at both ends of the cylindrical groove (8).

6. The mechanical pressure reducing valve assembly according to claim 5, characterized in that, A lead screw (16) is rotatably mounted on the cover plate (14), and one end of the lead screw (16) is constructed with a prism groove (17), while the other end is threaded into the cylindrical block (15).

7. The mechanical pressure reducing valve assembly according to claim 1, characterized in that, The drive unit (7) includes a handle (701) rotatably mounted on the top of the housing (3). The bottom end of the handle (701) is threaded with a stop (702), and the stop (702) slides with the housing (3) and abuts against the top of the first spring (6).

8. The mechanical pressure reducing valve assembly according to claim 7, characterized in that, The top of the housing (3) is provided with a groove (18), and the abutment (702) is piston-engaged with the groove (18).

9. The mechanical pressure reducing valve assembly according to claim 7, characterized in that, The push plate (5) has a sleeve (19) at its top end, and the bottom end of the first spring (6) is located inside the sleeve (19). The bottom end of the stop block (702) has a plug (20), and the plug (20) is inserted into the top end of the first spring (6).

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