Execution device and diaphragm valve

Abstract

The utility model provides an executing device and a diaphragm valve, which belong to the technical field of valves, the executing device comprises a mounting shell, the mounting shell comprises a first shell and a second shell which are detachably arranged, one of the first shell and the second shell is provided with a locking part, and the other of the first shell and the second shell is provided with a locking groove; an unlocking groove is further formed in the position of the locking groove in a communicating mode. When the locking part moves into the locking groove, the first shell and the second shell are connected to form a mounting cavity; when the locking part moves into the unlocking groove, the first shell can be separated from the second shell; the utility model has the advantages that the mounting shell comprises the first shell and the second shell which are detachably arranged, the first shell and the second shell are connected to form the mounting cavity for mounting the executing pieces such as the valve rod and the elastic piece, and when the first shell and the second shell are separated, the first shell is opened relative to the second shell, and the executing pieces in the mounting cavity are exposed in a visual field; parts in the execution device can be replaced conveniently, the whole execution device does not need to be replaced, and use waste of products is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to an actuator and a diaphragm valve. Background Art

[0002] The pneumatic diaphragm valve is a special form of cut-off valve, which emerged in the 1920s. Its opening and closing part is a diaphragm made of soft material, so it is called a pneumatic diaphragm valve. The most prominent feature of the pneumatic diaphragm valve is that the diaphragm separates the lower valve body from the upper actuator, so that parts such as the push rod and valve flap above the diaphragm are not corroded by the medium, eliminating the packing seal structure and preventing medium leakage.

[0003] The existing pneumatic diaphragm valve generally includes a valve body, a diaphragm part and an actuator. The diaphragm part is arranged at the fluid passage and can move under the drive of the actuator to control the connection and disconnection (or disengagement) of the fluid passage, so as to achieve flow control. Although the existing pneumatic diaphragm valve basically meets the use requirements, there are still deficiencies. For example, its actuator uses a traditional metal spring as a pressing part to provide a variable force for driving the diaphragm part to cut off the fluid passage. Due to the material characteristics of the spring metal, during long-term use, the metal spring expands and contracts repeatedly under the action of load, and is prone to spring fatigue, resulting in a decrease in spring elasticity and affecting the flow control accuracy of the pneumatic diaphragm valve; in severe cases, the metal spring may even break or fail. However, since the valve cover of the current diaphragm valve is formed by welding two shells, if the elastic part or the sealing part is damaged, only the entire actuator can be replaced, resulting in waste of products and increased economic costs. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a diaphragm valve with a detachable mounting shell for the actuator in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved by the following technical solutions: An actuator, comprising: a mounting shell, the mounting shell includes a first shell and a second shell which are detachably arranged, a locking part is arranged on one of the first shell and the second shell, a locking groove is arranged on the other one of them, and an unlocking groove is also communicated with the locking groove;

[0006] Wherein, when the locking part moves into the locking groove, the first shell and the second shell are connected to form a mounting cavity;

[0007] When the locking part moves into the unlocking groove, the first shell can be disengaged from the second shell.

[0008] In the above-mentioned diaphragm valve, the number of the locking parts is three, and the three locking parts are distributed at intervals in a ring shape. The number and positions of the locking grooves, the unlocking grooves and the locking parts correspond one by one.

[0009] In the above-mentioned actuator, the locking part includes a strip-shaped locking block.

[0010] In the above-mentioned actuator, the moving direction of the locking part in the unlocking groove is perpendicular to the moving direction of the locking part in the locking groove.

[0011] In the above-mentioned actuator, it further includes a limiting part. A first limiting hole is provided on the shell wall of the first shell, and a through second limiting hole is provided on the shell wall of the second shell. When the first shell is connected to the second shell, the first limiting hole and the second limiting hole are coaxial, and the first end of the limiting part passes through the second limiting hole and extends into the first limiting hole, and the second end of the limiting part is located in the second limiting hole.

[0012] In the above-mentioned actuator, a valve rod capable of reciprocating linearly is arranged in the mounting shell. An elastic part is arranged on the valve rod. The first end of the elastic part abuts against the first shell, and the second end of the elastic part is connected to the valve rod.

[0013] A diaphragm valve includes the above-mentioned actuator, and further includes a sealing diaphragm and a valve body. The sealing diaphragm is located between the valve body and the mounting shell. A dismounting part is detachably arranged at the end of the valve rod. A first mounting part and a second mounting part are arranged on the dismounting part. A gap is formed between the first mounting part and the second mounting part to form a fixing cavity. An installation seat is arranged on the sealing diaphragm. An installation cavity with an opening is arranged in the installation seat. The cavity wall of the installation cavity abuts and is fixed to the first mounting part and the second mounting part respectively, and a reinforcing part extends into the fixing cavity on the cavity wall of the installation cavity.

[0014] In the above-mentioned diaphragm valve, connecting racks are arranged on the outer peripheral surfaces of the first mounting part and / or the second mounting part.

[0015] In the above-mentioned diaphragm valve, a connecting part is arranged on the first mounting part. A step is formed between the first mounting part and the connecting part. The cavity wall of the installation cavity abuts against the outer peripheral surface of the connecting part.

[0016] In the above-mentioned diaphragm valve, a horizontal reference plane is arranged on the outer wall of the valve body. When the horizontal reference plane is in the horizontal direction, the valve body reaches the self-draining angle.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: The mounting shell includes a first shell and a second shell which are detachably arranged. When the first shell and the second shell are connected, an installation cavity for installing actuators such as valve stems and elastic members is formed. When the first shell and the second shell are separated, the first shell opens relative to the second shell, and the actuators in the installation cavity are exposed to view, facilitating the replacement of the components therein without replacing the entire actuator device, thereby reducing the waste of product use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective structural view of the mounting shell;

[0019] Figure 2 is an exploded structural view of the first shell and the second shell;

[0020] Figure 3 is a perspective structural view of the first shell;

[0021] Figure 4 is Figure 1 the sectional structural view of

[0022] Figure 5 is a perspective structural view of the diaphragm valve;

[0023] Figure 6 is a perspective structural view of the sealing diaphragm;

[0024] Figure 7 is a perspective structural view of the disassembly and assembly part;

[0025] Figure 8 is the sectional structural view of the sealing diaphragm;

[0026] Figure 9 is a perspective structural view of the valve body;

[0027] Figure 10 is a state diagram of the diaphragm valve at the self-draining angle.

[0028] In the figures, 100, mounting shell; 101, first shell; 102, second shell; 103, locking part; 104, unlocking groove; 105, locking groove; 106, limiting part; 107, elastic member; 108, valve stem; 109, first limiting hole; 110, second limiting hole; 111, abutting part; 200, sealing diaphragm; 201, disassembly and assembly part; 202, first installation part; 203, second installation part; 204, fixed cavity; 205, strengthening part; 206, connecting rack; 207, connecting part; 208, mounting seat; 209, installation cavity; 300, valve body; 301, horizontal reference plane. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following are specific embodiments of the present utility model, and in combination with the accompanying drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments. It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] As Figures 1-4 shown, an actuating device includes:

[0031] A mounting shell 100, the mounting shell 100 includes a first shell 101 and a second shell 102 which are detachably arranged. A locking portion 103 is arranged on one of the first shell 101 and the second shell 102, and a locking groove 105 is arranged on the other one of them. An unlocking groove 104 is also communicated with the locking groove 105.

[0032] Wherein, when the locking portion 103 moves into the locking groove 105, the first shell 101 and the second shell 102 are connected to form a mounting cavity.

[0033] When the locking portion 103 moves into the unlocking groove 104, the first shell 101 can be disengaged from the second shell 102.

[0034] In this embodiment, the mounting shell 100 includes a first shell 101 and a second shell 102 which are detachably arranged. When the first shell 101 and the second shell 102 are connected, a mounting cavity for mounting actuating parts such as a valve stem 108 and an elastic member 107 is formed. When the first shell 101 and the second shell 102 are separated, the first shell 101 is opened relative to the second shell 102, and the actuating parts in the mounting cavity are exposed to view, facilitating the replacement of the components therein without replacing the entire actuating device, reducing the waste of product use.

[0035] It is worth mentioning that in order to ensure uniform distribution of the relative force between the first shell 101 and the second shell 102, the number of the locking portions 103 is three, and the three locking portions 103 are annularly and spacedly distributed. The locking groove 105, the unlocking groove 104 correspond to the number and position of the locking portions 103 one by one.

[0036] As Figures 2-3 shown, as one of the preferred solutions, the locking portion 103 is located on the inner side wall of the first shell 101, the locking groove 105 and the unlocking groove 104 are located on the second shell 102, and an installation ring is arranged on the second shell 102. The locking groove 105 and the unlocking groove 104 are both arranged on the installation ring, so that after the first shell 101 and the second shell 102 are connected, the outer end faces of the first shell 101 and the second shell 102 are flush.

[0037] Specifically, the locking portion 103 includes a strip-shaped locking block, which increases the contact area between the locking portion 103 and the locking groove 105, thereby increasing the connection stability between the two.

[0038] Further preferably, the moving direction of the locking portion 103 in the unlocking groove 104 is perpendicular to the moving direction of the locking portion 103 in the locking groove 105.

[0039] In this embodiment, when the first housing 101 needs to be fixed to the second housing 102, the locking portion 103 is aligned with the unlocking groove 104. As the first housing 101 and the second housing 102 approach each other, the locking portion 103 extends into the unlocking groove 104. When they can no longer approach, the first housing 101 is rotated relatively, so that the locking portion 103 moves from the unlocking groove 104 to the locking groove 105 until they can no longer rotate relatively. At this time, they are already installed in place, and the installation is convenient.

[0040] Further preferably, it further includes a limiting portion 106. A first limiting hole 109 is provided on the shell wall of the first housing 101, and a through second limiting hole 110 is provided on the shell wall of the second housing 102. When the first housing 101 is connected to the second housing 102, the first limiting hole 109 and the second limiting hole 110 are coaxial, and the first end of the limiting portion 106 passes through the second limiting hole 110 and extends into the first limiting hole 109, and the second end of the limiting portion 106 is located in the second limiting hole 110.

[0041] In this embodiment, after the locking portion 103 is located in the locking groove 105, the separation movement between the first housing 101 and the second housing 102 is restricted. However, during use, the first housing 101 may rotate relative to the second housing 102, resulting in a problem of connection failure between the first housing 101 and the second housing 102. Therefore, the limiting portion 106 is provided to limit the position of the relative rotation direction after the first housing 101 and the second housing 102 are connected; specifically, the limiting portion 106 includes a set screw, the first end of the set screw passes through the second limiting hole 110 and is screwed and fixed to the first limiting hole 109, and the second end of the set screw is located in the second limiting hole 110.

[0042] As Figure 4 shown, further preferably, a valve rod 108 that can reciprocate linearly is provided in the mounting shell 100. An elastic member 107 is provided on the valve rod 108. The first end of the elastic member 107 abuts against the first housing 101, and the second end of the elastic member 107 is connected to the valve rod 108.

[0043] Specifically, an abutting portion 111 is provided on the valve rod 108, and the second end of the elastic member 107 abuts against the abutting portion 111.

[0044] In this embodiment, after the locking portion 103 extends into the locking groove 105, the first housing 101 has a tendency to move away from the second housing 102 under the elastic force of the elastic member 107. Then, the relative abutting force between the locking portion 103 provided on the first housing 101 and the locking groove 105 increases, and the connection stability between the first housing 101 and the second housing 102 increases accordingly.

[0045] As Figures 5-8 shown, a diaphragm valve includes the above-mentioned actuating device, and further includes a sealing diaphragm 200 and a valve body 300. The sealing diaphragm 200 is located between the valve body 300 and the mounting housing 100. A dismounting and assembling portion 201 is detachably provided at the end of the valve stem 108. A first mounting portion 202 and a second mounting portion 203 are provided on the dismounting and assembling portion 201. A gap is provided between the first mounting portion 202 and the second mounting portion 203 to form a fixing cavity 204. An installation seat 208 is provided on the sealing diaphragm 200. An installation cavity 209 is provided in the installation seat 208. The cavity walls of the installation cavity 209 are respectively abutted and fixed to the first mounting portion 202 and the second mounting portion 203, and a reinforcing portion 205 extends into the fixing cavity 204 on the cavity walls of the installation cavity 209.

[0046] Specifically, the dismounting and assembling portion 201 can be selected as a screw threadedly connected to the valve stem 108, or a pin can be selected to connect to the valve stem 108.

[0047] In this embodiment, the sealing diaphragm 200 moves up and down under the action of an actuator (such as manual, pneumatic or electric) to open or close the valve. When the diaphragm is lifted, the fluid can pass through the valve; when the diaphragm is pressed against the valve seat, the valve closes to prevent the fluid from flowing. During the use of the diaphragm valve, the sealing diaphragm 200 may experience tens of thousands of reciprocating motions. Generally, the sealing diaphragm 200 is made of rubber or plastic, while the connecting portion 207 is made of metal. Due to the different materials, it is easy to generate a gap and cause the connection between the two to fail. Therefore, in this application, two mounting portions are provided on the connecting portion 207 to increase the connection area with the sealing diaphragm 200. And in order to further strengthen the connection, a gap is provided between the first mounting portion 202 and the second mounting portion 203 to form a fixing cavity 204, and a reinforcing portion 205 extends into the fixing cavity 204 on the cavity walls of the installation cavity 208.

[0048] It is worth mentioning that connecting racks 206 are provided on the outer peripheral surfaces of the first mounting portion 202 and / or the second mounting portion 203 to increase the contact area with the sealing diaphragm 200 and increase the friction force between the two.

[0049] Further preferably, a connecting portion 207 is provided on the first mounting portion 202. A step is formed between the first mounting portion 202 and the connecting portion 207, and the inner wall of the mounting cavity 209 abuts against the outer peripheral surface of the connecting portion 207.

[0050] In this embodiment, in order to enable the mounting seat 208 to cover the upper surface of the first mounting portion 202 to ensure a stable connection between the first mounting portion 202 and the mounting seat 208, a connecting portion 207 is provided on the first mounting portion 202. Horizontally, the first mounting portion 202 protrudes from the connecting portion 207, so that a step is formed between the first mounting portion 202 and the connecting portion 207, and the inner wall of the mounting cavity 209 abuts against the outer peripheral surface of the connecting portion 207.

[0051] As Figures 9-10 shown, it is worth mentioning that a horizontal reference plane 301 is provided on the outer wall of the valve body 300. When the horizontal reference plane 301 is in the horizontal direction, the valve body 300 reaches the self-draining angle to avoid the residue of liquid in the diaphragm valve. Compared with the existing method of using a protractor to adjust the self-draining angle, the method of using the reference plane to make the valve body 300 reach the self-draining angle is simpler in operation. It is only necessary to use a level or the like to make the reference plane in the horizontal direction.

[0052] It should be noted that in the present invention, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. Terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0054] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. An execution device, characterized in that: include: A mounting shell, the mounting shell comprising a first shell and a second shell that are detachably arranged, one of the first shell and the second shell being provided with a locking portion, the other of the first shell and the second shell being provided with a locking groove, the locking groove being connected to an unlocking groove; Wherein, when the locking portion moves into the locking groove, the first shell and the second shell are connected to form a mounting cavity; When the locking portion moves into the unlocking slot, the first shell can be disengaged relative to the second shell.

2. An execution device according to claim 1, characterized in that: The number of the locking parts is three, and the three locking parts are distributed in a ring-shaped manner. The number and positions of the locking grooves and the unlocking grooves correspond to the locking parts one by one.

3. An execution device according to claim 1, characterized in that: The locking portion comprises a long strip-shaped locking block.

4. An execution device according to claim 1, characterized in that: A moving direction of the locking portion in the unlocking groove is perpendicular to a moving direction of the locking portion in the locking groove.

5. An execution device according to claim 1, characterized in that: It also includes a limiting portion, a first limiting hole is arranged on the shell wall of the first shell, and a through second limiting hole is arranged on the shell wall of the second shell. When the first shell is connected with the second shell, the first limiting hole is coaxial with the second limiting hole, and the first end of the limiting portion passes through the second limiting hole and extends into the first limiting hole, and the second end of the limiting portion is located in the second limiting hole.

6. An execution device according to claim 1, characterized in that: A valve stem which can reciprocate in a linear direction is arranged in the mounting shell, and an elastic member is arranged on the valve stem. The first end of the elastic member abuts against the first shell, and the second end of the elastic member is connected to the valve stem.

7. A diaphragm valve, characterized in that: It includes an actuator as described in any one of claims 1 to 6, and also includes a sealing diaphragm and a valve body, the sealing diaphragm is located between the valve body and the mounting shell, the end of the valve stem is detachably provided with a disassembly portion, the disassembly portion is provided with a first mounting portion and a second mounting portion, a gap is provided between the first mounting portion and the second mounting portion to form a fixed cavity, the sealing diaphragm is provided with a mounting seat, a mounting cavity with an opening is provided in the mounting seat, the cavity walls of the mounting cavity are respectively abutted and fixed to the first mounting portion and the second mounting portion, and a reinforcement portion is further provided on the cavity wall of the mounting cavity to extend into the fixed cavity.

8. A diaphragm valve according to claim 7, characterized in that: A connecting rack is arranged on the outer circumferential surface of the first mounting portion and / or the second mounting portion.

9. A diaphragm valve according to claim 7, characterized in that: A connecting portion is provided on the first mounting portion, a step is formed between the first mounting portion and the connecting portion, and a cavity wall of the mounting cavity abuts against an outer peripheral surface of the connecting portion.

10. The diaphragm valve according to claim 7, characterized in that: A horizontal reference plane is arranged on the outer wall of the valve body. When the horizontal reference plane is in a horizontal direction, the valve body reaches a self-draining angle.

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