Back pressure valve with high chemical resistance and excellent sealing performance

Abstract

The utility model discloses a back pressure valve with high chemical resistance and excellent sealing performance, which comprises a valve body made of PEEK (polyetheretherketone) material and provided with an adjusting channel penetrating through the valve body; a sealing groove is formed in the valve seat; the adjusting bolt is in threaded connection with the interior of the adjusting channel; the spring is arranged on the adjusting bolt and located in the adjusting channel; the spring sleeve is arranged in the adjusting channel in a sliding manner and is pushed to slide by the adjusting bolt through the spring; the sealing ring is made of a PEEK (Polyether Ether Ketone) material and is arranged in the sealing groove; the screw is used for connecting the valve seat with the valve body; the diaphragm is arranged on the valve seat and makes contact with the sealing ring, and the spring sleeve makes contact with the diaphragm. The back pressure valve solves the problem that when an existing back pressure valve faces corrosive media, the sealing performance can be gradually reduced, and therefore the stability and safety of a whole system are affected.

Description

Technical Field

[0001] The utility model relates to the technical field of back pressure valves, and particularly relates to a back pressure valve with high chemical resistance and excellent sealing performance. Background Art

[0002] Existing back pressure valves are widely used in industries such as chemical engineering and pharmaceuticals. They are mainly used to maintain the stability of the system pressure and ensure the continuity and controllability of the process flow.

[0003] However, in the face of corrosive media, the sealing performance of many existing back pressure valves will gradually decline, which will affect the stability and safety of the entire system operation. Summary of the Utility Model

[0004] The purpose of the utility model is to design a back pressure valve with high chemical resistance and excellent sealing performance to solve the problem that the sealing performance of the existing back pressure valve gradually declines in the face of corrosive media, affecting the stability and safety of the entire system.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions:

[0006] The utility model designs a back pressure valve with high chemical resistance and excellent sealing performance, which includes:

[0007] A valve body, which is made of PEEK material and is provided with an adjustment channel penetrating through the valve body;

[0008] A valve seat, which is provided with a sealing groove;

[0009] An adjustment bolt, which is threadedly connected in the adjustment channel;

[0010] A spring, which is arranged on the adjustment bolt and is located in the adjustment channel;

[0011] A spring sleeve, which is slidably arranged in the adjustment channel and is pushed by the adjustment bolt through the spring to slide;

[0012] A sealing ring, which is made of PEEK material and is arranged in the sealing groove;

[0013] A screw, which is used to connect the valve seat and the valve body;

[0014] And a diaphragm, which is arranged on the valve seat and contacts the sealing ring, and the spring sleeve contacts the diaphragm.

[0015] Further, a back pressure valve with high chemical resistance and excellent sealing performance: A first connection hole is further provided on the valve body, and a second connection hole corresponding to the first connection hole one by one is provided on the valve seat, and the second connection hole penetrates through the valve seat; The screw is connected in the first connection hole and the second connection hole for connecting the valve seat and the valve body.

[0016] Furthermore, a back pressure valve with high chemical resistance and excellent sealing performance: The first connection hole and the second connection hole are respectively provided in two groups, and the two groups of first connection holes are respectively arranged on both sides of the adjustment channel.

[0017] Further, a back pressure valve with high chemical resistance and excellent sealing performance: The valve body is made of PEEK material by an injection molding process.

[0018] Further, a back pressure valve with high chemical resistance and excellent sealing performance: The adjusting bolt is processed with high-precision threads to ensure the accuracy of adjustment.

[0019] Further, a back pressure valve with high chemical resistance and excellent sealing performance: The spring is processed with corrosion-resistant materials.

[0020] Advantages of the present utility model:

[0021] (1) The back pressure valve designed by the present utility model has high chemical resistance: The application of PEEK material enables the back pressure valve to resist the erosion of various chemical media.

[0022] (2) The back pressure valve designed by the present utility model has excellent sealing performance: The optimized sealing structure and precise processing technology significantly improve the sealing reliability of the back pressure valve.

[0023] (3) The back pressure valve designed by the present utility model can achieve precise back pressure control: The high-precision adjusting bolt allows users to precisely set the back pressure according to process requirements.

[0024] (4) The back pressure valve designed by the present utility model is easy to maintain: The modular structure design makes the maintenance and component replacement of the back pressure valve faster, reducing the maintenance difficulty and cost. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 Schematic diagram of the structure of a back pressure valve with high chemical resistance and excellent sealing performance designed for Embodiment 1 of the present utility model.

[0027] Markings in the figure: 1 - valve body, 2 - valve seat, 3 - adjusting bolt, 4 - spring, 5 - spring sleeve, 6 - sealing ring, 7 - screw, 8 - diaphragm, 11 - adjusting channel, 12 - first connection hole, 21 - sealing groove, 22 - second connection hole. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present utility model and its application or use. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein.

[0030] Embodiment 1

[0031] As Figure 1 shown, in this Embodiment 1, a back pressure valve with high chemical resistance and excellent sealing performance is designed. The back pressure valve includes:

[0032] A valve body 1, which is made of PEEK material through an injection molding process, and is provided with an adjusting channel 11 and a first connection hole 12 penetrating through the valve body 1;

[0033] A valve seat 2, on which a sealing groove 21 and second connection holes 22 corresponding one by one to the positions of the first connection holes 12 are provided, and the second connection holes 22 are arranged in a way that penetrates through the valve seat 2;

[0034] An adjusting bolt 3, which is machined with high-precision threads to ensure the accuracy of adjustment, and the adjusting bolt 3 is threadedly connected in the adjusting channel 11;

[0035] A spring 4, which is made of corrosion-resistant material and is arranged on the adjusting bolt 3 and located in the adjusting channel 11;

[0036] A spring sleeve 5, which is slidably arranged in the adjusting channel 11, and the spring sleeve 5 is pushed by the adjusting bolt 3 through the spring 4 to slide in the adjusting channel 11;

[0037] A sealing ring 6, which is made of PEEK material and is arranged in the sealing groove 21;

[0038] A screw 7, which is connected in the first connection hole 12 and the second connection hole 22 to connect the valve seat 2 and the valve body 1;

[0039] And a diaphragm 8, which is arranged on the valve seat 2 and contacts the sealing ring 6, and the spring sleeve 5 contacts the diaphragm 8.

[0040] Specifically, the back pressure valve designed in the above-mentioned Embodiment 1 has high chemical resistance and excellent sealing performance. The valve body 1 is made of PEEK material through an injection molding process, endowing the back pressure valve with high chemical resistance and high temperature resistance, and at the same time ensuring dimensional accuracy and surface finish; the valve seat 2 is designed with a sealing groove 21 with a special geometric shape, which can form a tight fit with the sealing ring 6, thereby improving the sealing performance of the back pressure valve; the adjusting bolt 3 is machined with high-precision threads, ensuring the accuracy of adjustment. By rotating the adjusting bolt 3, the compression amount of the spring 4 is changed, thereby adjusting the back pressure; the sealing ring 6 is made of PEEK material, and the PEEK sealing ring 6 contacts the valve seat 2 and the diaphragm 8, enhancing the sealing effect (that is, the PEEK sealing ring 6 enhances the friction coefficient with the diaphragm 8 and the valve seat 2, improving the sealing performance); the sealing surface of the diaphragm 8 and the valve seat 2 is precision machined to achieve a tight fit and a low leakage rate.

[0041] The back pressure valve designed by the present utility model solves the problem that the existing back pressure valve has a gradually decreasing sealing performance when facing corrosive media, thereby affecting the stability and safety of the entire system.

[0042] The above are the preferred embodiments of the present utility model, which are only used to explain the present utility model and not to limit the present utility model. Any obvious changes or variations derived from the technical solutions of the present utility model are still within the protection scope of the present utility model.

Claims

1. A back pressure valve with high chemical resistance and excellent sealing performance, characterized in that: The back pressure valve includes: A valve body (1) is made of PEEK material and is provided with an adjustment channel (11) penetrating the valve body (1); A valve seat (2) having a sealing groove (21) disposed thereon; An adjusting bolt (3) threadedly connected in the adjusting channel (11); a spring (4), which is arranged on the adjusting bolt (3) and located in the adjusting channel (11); A spring sleeve (5) is slidably disposed in the adjustment channel (11) and is pushed to slide by the adjustment bolt (3) through the spring (4); A sealing ring (6), made of PEEK material, disposed in the sealing groove (21); A screw (7) for connecting the valve seat (2) to the valve body (1); and a diaphragm (8) which is arranged on the valve seat (2) and in contact with the sealing ring (6); and the spring sleeve (5) is in contact with the diaphragm (8).

2. A back pressure valve with high chemical resistance and excellent sealing performance according to claim 1, characterized in that: The valve body (1) is also provided with a first connecting hole (12), and the valve seat (2) is provided with a second connecting hole (22) corresponding to the first connecting hole (12) one by one, and the second connecting hole (22) is arranged to penetrate the valve seat; the screw (7) is connected to the first connecting hole (12) and the second connecting hole (22) to connect the valve seat (2) to the valve body (1).

3. A back pressure valve with high chemical resistance and excellent sealing performance according to claim 2, characterized in that: The first connection holes (12) and the second connection holes (22) are respectively arranged in two groups, and the two groups of first connection holes (12) are respectively arranged on both sides of the adjustment channel (11).

4. A back pressure valve with high chemical resistance and excellent sealing performance according to claim 1, characterized in that: The valve body (1) is made of PEEK material through an injection molding process.

5. A back pressure valve with high chemical resistance and excellent sealing performance according to claim 1, characterized in that: The adjusting bolt (3) is processed by high-precision thread to ensure the accuracy of adjustment.

6. A back pressure valve with high chemical resistance and excellent sealing performance according to claim 1, characterized in that: The spring (4) is made of corrosion-resistant material.

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