Pneumatic diaphragm valve indicating rod assembling tool

Abstract

The utility model discloses a pneumatic diaphragm valve indicating rod assembling tool which comprises a sleeve and a handle, an opening is formed in one end of the sleeve and used for receiving an indicating rod, the other end of the sleeve is fixedly connected with the handle, and a check block is arranged at the position, away from the end provided with the opening by a certain distance, of the peripheral face of the sleeve. According to the indicating rod and the piston assembled by the pneumatic diaphragm valve indicating rod assembling tool, the twisting depth of the indicating rod can be consistent during each time of installation, the assembling height of valve parts can be kept consistent, the assembling precision and the product quality are ensured, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery, and particularly relates to an assembly tool for an indicating rod of a pneumatic diaphragm valve. Background Art

[0002] Ultra-pure pipelines transport chemical media that are toxic, strong acids, strong alkalis, etc., which are harmful to human contact. It is required that PFA valves and pipe fittings in the pipeline system have reliable sealing and long service life. At present, PFA valves are produced by injection molding of parts, but problems will occur during part assembly. For example, the height of the indicating rod is inconsistent every time the piston of the diaphragm valve and the indicating rod are assembled. As Figure 1 shown, the traditional method of installing the indicating rod is to manually screw the thread 32 of the indicating rod 3 into the piston 4 by hand, and judge that the indicating rod 3 is screwed in place when it can no longer be tightened. However, this method cannot ensure that the indicating rod 3 is screwed to the same depth every time, that is, it cannot ensure that the height of all piston and indicating rod assemblies is the same after the indicating rod is installed, resulting in inconsistent product quality in the same batch and reducing production efficiency.

[0003] Technical Content

[0004] In view of the above problems, the utility model provides an assembly tool for an indicating rod of a pneumatic diaphragm valve.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An assembly tool for an indicating rod of a pneumatic diaphragm valve, comprising a sleeve and a handle. One end of the sleeve is provided with an opening for receiving the indicating rod. The other end of the sleeve is fixedly connected to the handle. A stop block is provided on the outer peripheral surface of the sleeve at a certain distance from the end with the opening.

[0007] Preferably, a tapered connecting piece is further provided between the handle and the sleeve.

[0008] Preferably, the handle is in a long strip shape, and the connection position between the sleeve and the handle is located at the middle position in the length direction of the handle.

[0009] Preferably, the number of the stop blocks is 2, and they are oppositely distributed on the outer peripheral surface of the sleeve.

[0010] Preferably, when the indicating rod is received in the sleeve, the two are in an interference fit state.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The indicating rod and piston assembled by using a pneumatic diaphragm valve indicating rod assembling tool of the present utility model can make the screwing depth of the indicating rod consistent each time during installation, keep the assembling height of valve parts consistent, ensure the assembling precision and product quality, and improve the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below in conjunction with the drawings.

[0014] Figure 1 It is a schematic diagram of the current manual installation of the indicating rod and piston.

[0015] Figure 2 It is a schematic diagram of a pneumatic diaphragm valve indicating rod assembling tool of the present utility model.

[0016] Figure 3 It is a side view of a pneumatic diaphragm valve indicating rod assembling tool of the present utility model.

[0017] Figure 4 It is a top view of a pneumatic diaphragm valve indicating rod assembling tool of the present utility model.

[0018] Figure 5 It is a sectional view of an embodiment of a pneumatic diaphragm valve indicating rod assembling tool of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and 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 therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. 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", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0020] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] The embodiments of the present utility model will be described below in conjunction with the accompanying drawings of the specification. It should be noted that the embodiments involved in this specification are not exhaustive and do not represent the only embodiments of the present utility model. The following corresponding examples are only for clearly explaining the content of the utility model of the present utility model patent and do not limit its embodiments. For those of ordinary skill in the art, different forms of changes and modifications can be made on the basis of the description of these embodiments, and any changes or modifications that belong to the technical concept and content of the present utility model and are obvious are also within the protection scope of the present utility model.

[0022] As Figures 1-4 shown, a pneumatic diaphragm valve indicating rod assembly tool of a preferred embodiment of the present utility model includes a sleeve 1 and a handle 2. One end of the sleeve 1 is provided with an opening 12 for receiving the indicating rod 3. Specifically, the indicating rod 3 has a rod portion 31 and a threaded portion 32 at the lower end of the rod portion. The sleeve 1 receives the rod portion 31 of the indicating rod from the opening 12, and the threaded portion 32 exposes the opening 12 of the sleeve 1 (i.e., not inside the sleeve 1). Preferably, the depth inside the sleeve 1 is equal to the length of the rod portion 31 of the indicating rod 3. The other end of the sleeve 1 is fixedly connected to the handle 2. A stop block 11 is provided on the outer peripheral surface of the sleeve 1 at a certain distance from the end with the opening 12. Preferably, this distance should be equal to the side wall height H of the piston 4.

[0023] Preferably, there is also a tapered connecting member 13 between the handle 2 and the sleeve 1, which helps to stably connect the handle 2 and the sleeve 1.

[0024] Preferably, the handle 2 is in a long strip shape, and the connection position between the sleeve 1 and the handle 2 is located at the middle position in the length direction of the handle 2, which is convenient for the operator to rotate the assembly tool to tighten the indicating rod 3 and connect it to the piston 4.

[0025] Preferably, the number of the stop blocks 12 is 2, and they are relatively distributed on the outer peripheral surface of the sleeve 1, as Figure 4 shown.

[0026] Preferably, when the indicating rod 3 is received and accommodated in the sleeve 1, the two are in an interference fit state. The assembly tool of the preferred embodiment of the present utility model can be made of materials with certain elasticity such as PFA or other non-high-purity materials. Due to the elasticity of the material itself, when the indicating rod 3 is received and accommodated in the sleeve 1, an interference fit occurs between the two, so as to ensure that when the threads are aligned and the indicating rod 3 is rotated, there is no relative rotation between the indicating rod 3 and the sleeve 1, but the indicating rod 3 rotates synchronously with the sleeve 1.

[0027] As Figure 5 shown, the usage method of the preferred embodiment of the present utility model is as follows: First, insert the indicating rod 3 into the opening 12 at the bottom of the sleeve 1 of the assembly tool of the present utility model, then align the threaded portion 32 of the indicating rod 3 with the thread on the piston 4 and screw it in until the stop block 11 on the assembly tool contacts the piston 4, then stop screwing and pull out the assembly tool.

[0028] The indicating rod and the piston assembled by using an assembly tool for an indicating rod of a pneumatic diaphragm valve of the present utility model can make the depth of rotation of the indicating rod consistent each time during installation, keep the assembly height of the valve parts consistent, ensure the assembly accuracy and product quality, and improve the production efficiency.

[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0030] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pneumatic diaphragm valve indicator stem assembly tool, characterized in that: It comprises a sleeve and a handle, one end of the sleeve is provided with an opening for receiving the indicating rod, the other end of the sleeve is fixedly connected with the handle, and a stopper is provided on the outer peripheral surface of the sleeve at a certain distance from the end provided with the opening.

2. The pneumatic diaphragm valve indicator stem assembly tool according to claim 1, characterized in that: A tapered connecting piece is also provided between the handle and the sleeve.

3. The pneumatic diaphragm valve indicator stem assembly tool according to claim 1, characterized in that: The handle is in the shape of an elongated strip, and the connection position between the sleeve and the handle is located in the middle position of the handle in the length direction.

4. The pneumatic diaphragm valve indicator stem assembly tool according to claim 1, characterized in that: The number of the stoppers is 2, which are relatively distributed on the outer peripheral surface of the sleeve.

5. The pneumatic diaphragm valve indicator stem assembly tool according to claim 1, characterized in that: When the indicating rod is received in the sleeve, the two are in an interference fit state.

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