Pressure regulating valve with overload protection function

Abstract

The utility model discloses a pressure regulating valve with an overload protection function, which belongs to the technical field of pressure regulating valves, and is characterized by comprising a pressure regulating valve body, the front side of the pressure regulating valve body is fixedly communicated with a pressure relief pipe, a pressure relief mechanism is arranged in the pressure relief pipe, and a jacking mechanism is arranged on the front side of the pressure relief pipe; the pressure relief mechanism comprises a conical head, three sealing rings, a limiting hole and a sealing plug, and solves the problems that part of existing pressure regulating valves are not provided with overload protection structures, when the internal pressure of a pipeline is suddenly increased, instantly generated strong impact force can directly act on a valve element, the material of the valve element can be gradually tired after the impact is borne for a long time, abrasion is aggravated, and the service life of the valve element is prolonged. The problems that the sealing performance between the valve element and the valve seat is affected, the adjusting precision is reduced, the service life of the pressure adjusting valve is finally shortened, and even a pipeline or a valve body is exploded due to the fact that pressure cannot be released in time exist.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating valve technology, and in particular to a pressure regulating valve with overload protection function. Background Technology

[0002] Pressure regulating valves are key devices used in industry and daily life to control fluid pressure. They can automatically adjust the valve opening according to changes in system pressure, so that the system pressure is stabilized within the set range, ensuring safe operation of equipment and meeting the needs of different working conditions.

[0003] The existing filter screen needs to be cleaned frequently. When disassembling it, two flanges need to be removed. Since the flanges are installed with multiple pins, tools are needed to remove the pins when replacing the filter screen, which is cumbersome, time-consuming and labor-intensive.

[0004] The existing patent (publication number: CN219388751U) describes a pressure regulating valve with a simple structure, convenient use, strong connectivity, and easy replacement and cleaning of the filter screen inside the connecting ring.

[0005] To address the aforementioned issues, existing patents offer solutions. However, some existing pressure regulating valves lack overload protection structures. When the internal pressure of the pipeline suddenly increases, the instantaneous and powerful impact force directly acts on the valve core. Over time, the valve core material will gradually fatigue, leading to accelerated wear, affecting the sealing performance between the valve core and the valve seat, reducing regulation accuracy, and ultimately shortening the service life of the pressure regulating valve. In some cases, the pressure may not be released in time, causing the pipeline or valve body to burst.

[0006] Therefore, a pressure regulating valve with overload protection function is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a pressure regulating valve with overload protection function, which can solve the problem that some existing pressure regulating valves do not have an overload protection structure. When the pressure inside the pipeline suddenly increases, the strong impact force generated instantaneously will directly act on the valve core. If the valve core material is subjected to such impact for a long time, it will gradually fatigue, leading to accelerated wear, affecting the sealing performance between the valve core and the valve seat, reducing the regulation accuracy, and ultimately shortening the service life of the pressure regulating valve. In some cases, the pressure may not be released in time, leading to the pipeline or valve body bursting.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a pressure regulating valve with overload protection function, including a pressure regulating valve body, a pressure relief pipe fixedly connected to the front side of the pressure regulating valve body, a pressure relief mechanism provided inside the pressure relief pipe, and a jacking mechanism provided at the front side of the pressure relief pipe;

[0009] The pressure relief mechanism includes a conical head, three sealing rings, a limiting hole, and a sealing plug. The front side of the conical head is fixedly connected to the rear side of the sealing plug, and the limiting hole is opened on the front side of the sealing plug.

[0010] Preferably, the jacking mechanism includes a fixed block, a jacking rod, and several screwing blocks. The jacking rod is threaded inside the fixed block, and the screwing blocks are fixedly connected to the jacking rod on the side closest to the jacking rod.

[0011] Preferably, a fixing frame is fixedly connected to the rear side of the fixing block, and the fixing frame is fixedly sleeved on the surface of the pressure relief pipe.

[0012] Preferably, a top block is provided on the rear side of the top rod, a bearing is provided on the front side of the top block, the rear side of the outer wall of the bearing is fixedly connected to the front side of the top block, and the surface of the top rod is fixedly connected to the inner wall of the bearing.

[0013] Preferably, the inner wall of the pressure relief pipe is provided with limiting grooves, and the number of limiting grooves is three, and the surface of the sealing ring is fixedly connected to the inner wall of the limiting groove.

[0014] Preferably, the surface of the sealing plug has three annular grooves, and the sealing ring is fitted inside the annular grooves.

[0015] Preferably, the top and bottom of the front side of the sealing plug are fixedly connected to limiting blocks, and the limiting blocks have notches inside, with the inner wall of the notches in movable contact with the surface of the fixing frame.

[0016] Preferably, the sealing ring is made of polyurethane rubber, and the pressure relief pipe is made of ductile iron.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application seals the pressure relief pipe with a sealing ring and a sealing plug. When the internal pressure of the valve suddenly increases, the sealing plug and sealing ring can be pushed out of the pressure relief pipe, and the medium will be discharged from the inside of the pressure relief pipe to relieve pressure, thus avoiding impact damage to the pressure regulating valve body.

[0019] 2. In this application, after the sealing plug is moved forward out of the pressure relief pipe, when the internal pressure of the pressure regulating valve body is restored, the medium delivery can be cut off first, and then the push rod can be rotated to push the sealing plug and sealing ring backward to reset, restoring the seal of the pressure relief pipe, which is convenient for reuse, and the sealing ring can be removed and replaced from inside the annular groove. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the pressure regulating valve with overload protection function of this utility model.

[0021] Figure 2This is a three-dimensional exploded view of the pressure relief valve and sealing plug in this utility model;

[0022] Figure 3 This is a three-dimensional connection diagram of the jacking mechanism in this utility model;

[0023] Figure 4 This is a three-dimensional connection diagram of the pressure relief mechanism in this utility model;

[0024] Figure 5 This is a three-dimensional schematic diagram of the connection between the push rod and the bearing in this utility model;

[0025] Figure 6 This is a three-dimensional structural diagram of the sealing plug in this utility model.

[0026] In the diagram, 1. Pressure regulating valve body; 2. Pressure relief pipe; 3. Bearing; 4. Fixing bracket; 5. Limiting groove; 6. Notch; 7. Limiting block; 8. Pressure relief mechanism; 801. Conical head; 802. Sealing ring; 803. Limiting hole; 804. Sealing plug; 9. Pushing mechanism; 901. Fixing block; 902. Push rod; 903. Tightening block; 10. Push block; 11. Annular groove. Detailed Implementation

[0027] 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.

[0028] Please see Figure 1-6 The present invention provides the following technical solution:

[0029] A pressure regulating valve with overload protection function includes a pressure regulating valve body 1, a pressure relief pipe 2 fixedly connected to the front side of the pressure regulating valve body 1, a pressure relief mechanism 8 provided inside the pressure relief pipe 2, and a jacking mechanism 9 provided at the front side of the pressure relief pipe 2.

[0030] The pressure relief mechanism 8 includes a conical head 801, three sealing rings 802, a limiting hole 803, and a sealing plug 804. The front side of the conical head 801 is fixedly connected to the rear side of the sealing plug 804, and the limiting hole 803 is opened on the front side of the sealing plug 804.

[0031] In this embodiment: when the pressure regulating valve body 1 is operating at normal pressure, the pressure relief pipe 2 is sealed, allowing the pressure regulating valve body 1 to operate normally. When the pressure inside the pressure regulating valve body 1 increases sharply, exceeding the sealing resistance between the sealing ring 802 and the limiting groove 5, the pressure pushes the conical head 801 and the sealing plug 804 forward, causing the sealing ring 802 to deform and disengage from the limiting groove 5. The pressure relief pipe 2 opens, allowing some of the medium to be discharged and reducing pressure, thus preventing damage to the valve core and other components inside the pressure regulating valve body 1. This achieves overload protection and avoids the situation where some existing pressure regulating valves lack overload protection structures, and the sudden increase in internal pipeline pressure can cause a powerful impact that could directly damage the valve body. The valve core, subjected to such impacts over a long period, will gradually fatigue, leading to increased wear, affecting the sealing performance between the valve core and the valve seat, reducing adjustment accuracy, and ultimately shortening the service life of the pressure regulating valve. In some cases, the pressure may not be released in time, causing the pipeline or valve body to burst. After the pressure returns to normal, the medium delivery should be cut off first. The operator should then turn the screw block 903 to rotate the push rod 902. The push rod 902, through the bearing 3, will drive the push block 10 to move backward, pushing the sealing plug 804, so that the sealing ring 802 can be re-engaged into the limiting groove 5, restoring the seal of the pressure relief pipe 2, allowing the pressure relief pipe 2 to be reused.

[0032] Specifically, such as Figure 3 As shown, the jacking mechanism 9 includes a fixed block 901, a jacking rod 902 and several screw blocks 903. The jacking rod 902 is threadedly connected to the inside of the fixed block 901, and the screw blocks 903 are fixedly connected to the jacking rod 902 on the side near the jacking rod 902.

[0033] Specifically, such as Figure 1 and Figure 3 As shown, a fixing bracket 4 is fixedly connected to the rear side of the fixing block 901, and the fixing bracket 4 is fixedly sleeved on the surface of the pressure relief pipe 2.

[0034] Specifically, such as Figure 5 As shown, a top block 10 is provided on the rear side of the top rod 902, and a bearing 3 is provided on the front side of the top block 10. The rear side of the outer wall of the bearing 3 is fixedly connected to the front side of the top block 10, and the surface of the top rod 902 is fixedly connected to the inner wall of the bearing 3.

[0035] In this embodiment: after the internal pressure of the pressure regulating valve body 1 returns to normal, the medium delivery is first cut off. The operator rotates the push rod 902 by turning the screw block 903, causing the push rod 902 to move backward. The push rod 902 is rotatably connected to the top block 10 through the bearing 3. This connection method ensures that when the push rod 902 rotates, the top block 10 does not rotate with it, but pushes the sealing plug 804 backward as the push rod 902 moves. As the top block 10 pushes, the sealing plug 804 gradually moves backward until the sealing ring 802 on the sealing plug 804 is re-engaged into the limiting groove 5, thereby restoring the sealing function of the pressure relief pipe 2 and restoring the pressure regulating valve body 1 to normal working state. The fixing block 901 is supported on the front side of the pressure relief pipe 2 by the fixing bracket 4.

[0036] Specifically, such as Figure 2 As shown, the inner wall of the pressure relief pipe 2 is provided with limiting grooves 5, and there are three limiting grooves 5. The surface of the sealing ring 802 is fixedly connected to the inner wall of the limiting grooves 5.

[0037] Specifically, such as Figure 4 and Figure 6 As shown, the surface of the sealing plug 804 has an annular groove 11, and there are three annular grooves 11. The sealing ring 802 is fitted inside the annular groove 11.

[0038] In this embodiment: by contacting the surface of the sealing ring 802 with the inner wall of the limiting groove 5, the sealing plug 804 can be limited inside the pressure relief pipe 2, which facilitates the sealing of the pressure relief pipe 2. By fitting the sealing ring 802 inside the annular groove 11, the sealing ring 802 and the sealing plug 804 can be easily connected.

[0039] Specifically, such as Figure 1 and Figure 2 As shown, the top and bottom of the front side of the sealing plug 804 are fixedly connected to the limiting block 7. The limiting block 7 has a notch 6 inside, and the inner wall of the notch 6 is in contact with the surface of the fixing frame 4.

[0040] Specifically, such as Figure 1 and Figure 4 As shown, the sealing ring 802 is made of polyurethane rubber, and the pressure relief pipe 2 is made of ductile iron.

[0041] In this embodiment: Limiting blocks 7 are fixedly connected to the top and bottom of the front side of the sealing plug 804. The notch 6 inside the limiting block 7 is in movable contact with the surface of the fixing frame 4. The setting of the limiting block 7 and the notch 6 plays a guiding and limiting role, ensuring that the sealing plug 804 will not shift during movement, and making it convenient to reset the sealing plug 804. The polyurethane rubber sealing ring 802 has good elasticity and wear resistance, which can ensure a reliable sealing effect under normal working pressure. The pressure relief pipe 2 made of ductile iron has high strength and good toughness, and can withstand a certain pressure impact, ensuring that it will not be damaged during the pressure relief process.

[0042] Working principle: When the pressure regulating valve body 1 is working normally, the pressure relief pipe 2 is in a sealed state, which can effectively prevent medium leakage and withstand a certain pressure. The sealing plug 804 has three annular grooves 11 on its surface, and each annular groove 11 is fitted with a sealing ring 802 made of polyurethane rubber. Simultaneously, the inner wall of the pressure relief pipe 2 has three corresponding limiting grooves 5. The sealing ring 802 is tightly fitted inside the limiting grooves 5, and together with the sealing plug 804, seals the pressure relief pipe 2. The polyurethane rubber sealing ring 802 has good elasticity and wear resistance, ensuring a reliable sealing effect under normal working pressure, guaranteeing the normal operation of the pressure regulating valve body 1. When the internal pressure of the pressure regulating valve body 1 suddenly increases, exceeding... When the sealing resistance between the sealing ring 802 and the limiting groove 5 is exceeded, the internal pressure will exert a forward thrust on the conical head 801 and the sealing plug 804. Since the sealing plug 804 is fixedly connected to the conical head 801, they will move forward together, causing the sealing ring 802 to deform and disengage from the limiting groove 5. At this time, the sealing plug 804 moves forward, the pressure relief pipe 2 is opened, and some of the medium inside the pressure regulating valve body 1 can be discharged through the pressure relief pipe 2, thereby reducing the internal pressure of the pressure regulating valve body 1 and preventing damage to some internal components of the pressure regulating valve body 1 due to excessive pressure. This achieves the function of overload protection. The conical head 801 can disperse the medium in all directions. The pressure relief pipe 2, made of ductile iron, has high strength and good toughness. It can withstand a certain amount of pressure impact, ensuring that it will not be damaged during the pressure relief process. This avoids the problem of some existing pressure regulating valves lacking overload protection structures. When the internal pressure of the pipeline suddenly increases, the strong impact force generated instantaneously will directly act on the valve core. Long-term exposure to such impacts will cause the valve core material to gradually fatigue, leading to accelerated wear, affecting the sealing performance between the valve core and the valve seat, reducing the regulation accuracy, and ultimately shortening the service life of the pressure regulating valve. In some cases, the pressure may not be released in time, leading to the pipeline or valve body bursting. After the internal pressure of the pressure regulating valve body 1 returns to normal, the pressure relief pipe 2 needs to be restored to a sealed state. First, the medium delivery is cut off. The operator rotates the push rod 902 by turning the screw block 903. The push rod 902 is threaded into the inside of the fixed block 901. When the push rod 902 is rotated, it moves backward. The push rod 902 is rotatably connected to the push block 10 through the bearing 3. This connection method ensures that when the push rod 902 rotates, the push block 10 does not rotate with it, but instead pushes the sealing plug 804 backward as the push rod 902 moves. As the push block 10 pushes, the sealing plug 804 gradually moves backward until the sealing ring 802 on the sealing plug 804 re-engages into the limiting groove 5, thereby restoring the sealing function of the pressure relief pipe 2 and allowing the pressure regulating valve body 1 to return to normal working condition. In addition, limiting blocks 7 are fixedly connected to the top and bottom of the front side of the sealing plug 804. The notch 6 inside the limiting block 7 is in movable contact with the surface of the fixed frame 4.The limiting block 7 and the notch 6 serve as guides and limits, ensuring that the sealing plug 804 does not shift during movement and facilitating its repositioning.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 pressure regulating valve with overload protection function, comprising a pressure regulating valve body (1), characterized in that: The pressure regulating valve body (1) is fixedly connected to the front side of the pressure relief pipe (2), the pressure relief pipe (2) is provided with a pressure relief mechanism (8), and the pressure relief pipe (2) is provided with a push mechanism (9). The pressure relief mechanism (8) includes a conical head (801), three sealing rings (802), a limiting hole (803), and a sealing plug (804). The front side of the conical head (801) is fixedly connected to the rear side of the sealing plug (804), and the limiting hole (803) is opened on the front side of the sealing plug (804).

2. The pressure regulating valve with overload protection function according to claim 1, characterized in that: The jacking mechanism (9) includes a fixed block (901), a jacking rod (902) and several screw blocks (903). The jacking rod (902) is threaded inside the fixed block (901), and the screw blocks (903) are fixedly connected to the jacking rod (902) on the side near the jacking rod (902).

3. The pressure regulating valve with overload protection function according to claim 2, characterized in that: The fixing block (901) is fixedly connected to a fixing frame (4) on its rear side, and the fixing frame (4) is fixedly sleeved on the surface of the pressure relief pipe (2).

4. The pressure regulating valve with overload protection function according to claim 2, characterized in that: A top block (10) is provided on the rear side of the top rod (902), and a bearing (3) is provided on the front side of the top block (10). The rear side of the outer wall of the bearing (3) is fixedly connected to the front side of the top block (10), and the surface of the top rod (902) is fixedly connected to the inner wall of the bearing (3).

5. The pressure regulating valve with overload protection function according to claim 1, characterized in that: The inner wall of the pressure relief pipe (2) is provided with a limiting groove (5), and there are three limiting grooves (5). The surface of the sealing ring (802) is fixedly connected to the inner wall of the limiting groove (5).

6. The pressure regulating valve with overload protection function according to claim 1, characterized in that: The surface of the sealing plug (804) is provided with an annular groove (11), and there are three annular grooves (11). The sealing ring (802) is fitted inside the annular groove (11).

7. The pressure regulating valve with overload protection function according to claim 3, characterized in that: The top and bottom of the front side of the sealing plug (804) are fixedly connected to the limiting block (7), and the limiting block (7) has a notch (6) inside, and the inner wall of the notch (6) is in contact with the surface of the fixing frame (4).

8. The pressure regulating valve with overload protection function according to claim 1, characterized in that: The sealing ring (802) is made of polyurethane rubber, and the pressure relief pipe (2) is made of ductile iron.

Images