Valve piston connecting structure

Abstract

The utility model relates to the technical field of valves, and discloses a valve piston connecting structure, which is suitable for valves and comprises a valve rod, a piston sleeved on the valve rod, a valve rod connecting fixture block, a fixture block arranged at the top and the bottom of the piston and a fixture spring connected with the fixture block, and the fixture spring is matched with the fixture block to fix the piston. When the valve piston connecting structure is assembled, after the piston is sleeved with the valve rod, the top and the bottom of the piston are fixed through the clamping blocks, the clamping blocks are locked through the clamping springs, so that the piston is fixed and is difficult to slide up and down, when the piston is replaced, the clamping springs are detached, the clamping blocks are taken out, the piston can slide out of the valve rod, and a new piston is replaced for continuous use. The split type connection mode that the piston is arranged on the valve rod in a sleeving mode facilitates maintenance, and meanwhile the maintenance cost of the valve can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve piston connection structure. Background Art

[0002] Valves are pipe accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. They are also control components in fluid conveying systems, with functions such as cutoff, regulation, diversion, prevention of backflow, pressure stabilization, diversion, or overflow pressure relief. Diaphragm valves, as a type of valve, are commonly used in the food and beverage industry, pharmaceutical industry, chemical industry, water treatment system, biomedicine and other fields. In these fields, diaphragm valves can control the flow of fluids, adjust pressure, and prevent medium contamination.

[0003] Conventional diaphragm valves on the market use an integrated processing method for the piston and valve stem. During use, when the piston is damaged, it is necessary to remove the entire valve stem for replacement, which makes maintenance operations more difficult and causes the maintenance cost of the diaphragm valve to be very high. Utility Model Content

[0004] The purpose of the utility model is to provide a valve piston connection structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a valve piston connection structure, suitable for a valve, comprising: a valve stem, the valve stem sleeve is provided with a piston, the valve stem is connected to a clamping block, the clamping block is arranged at the top and bottom of the piston, the clamping block is connected to a retaining spring, and the retaining spring cooperates with the clamping block to fix the piston.

[0006] Preferably, the valve stem is provided with a slot.

[0007] Preferably, the clamping block is composed of two separate semicircular ring-shaped iron blocks.

[0008] Preferably, an interlocking portion is provided on the inner ring of the iron block.

[0009] Preferably, a clamping portion is provided on the outer ring of the iron block.

[0010] Preferably, the engaging portion is arranged in the card slot.

[0011] Preferably, the inner ring of the retaining spring is in close contact with the engaging portion.

[0012] The valve piston connection structure has the following beneficial effects:

[0013] The valve piston connection structure has the following advantages: during assembly, after the piston is inserted into the valve stem, the top and bottom of the piston are fixed in position with blocks, and then the blocks are locked by the retaining spring, thereby fixing the piston and making it difficult for it to slide up and down. When replacing the piston, the retaining spring is removed, the retaining block is taken out, and the piston can be slid out of the valve stem, and the new piston can be replaced and continued to be used. The split connection mode in which the piston is sleeved on the valve stem can greatly reduce the maintenance cost of the valve while facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a valve piston connection structure provided in an embodiment of the present application;

[0015] Figure 2 An exploded diagram of a valve piston connection structure provided in an embodiment of the present application;

[0016] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0017] Figure 4 for Figure 2 Schematic diagram of the middle card block.

[0018] In the figure: 1, valve stem; 11, slot; 2, piston; 3, clamping block; 31, fitting part; 32, clamping part; 4, retaining spring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1-Figure 3 As shown, the utility model provides an embodiment of a valve piston connection structure, which is suitable for valves. The valve piston connection structure comprises: a valve stem 1, a slot 11 is provided on the valve stem 1, and a piston 2 is sleeved on the valve stem 1.

[0021] Among them, the valve stem 1 is connected to the clamping block 3, the clamping block 3 is arranged at the top and bottom of the piston 2, and the clamping block 3 is connected to the retaining spring 4, the retaining spring 4 is made of 304 stainless steel or manganese steel, and the retaining spring 4 cooperates with the clamping block 3 to fix the piston 2.

[0022] Specifically, Figure 1 , Figure 4As shown, the clamping block 3 is composed of two split semicircular ring-shaped iron blocks, the inner circle of the iron block is provided with a fitting portion 31, the fitting portion 31 is arranged in the clamping groove 11, the outer circle of the iron block is provided with a clamping portion 32, and the inner circle of the retaining spring 4 is in contact with the clamping portion 32.

[0023] In this embodiment, when assembling in the valve, the piston 2 is first inserted into the valve stem 1, and the top and bottom of the piston 2 are fixed in position using the clamping block 3, the engaging portion 31 of the clamping block 3 is embedded in the clamping groove 11, and then the clamping block 3 is locked by the retaining spring 4, so that the clamping block 3 is fixed on the valve stem 1, thereby fixing the piston 2 on the valve stem 1 and making it difficult for it to slide up and down.

[0024] In the present application, when the piston 2 is damaged or has performance problems due to aging, the piston 2 in the valve needs to be replaced. During replacement, the retaining ring 4 is first removed using retaining ring pliers, and then the retaining block 3 is taken out (i.e., two split semicircular ring-shaped iron blocks are moved apart in the horizontal direction). The piston 2 can then be slid out of the valve stem 1 and replaced with a new piston 2 before continued use. The split connection method of the piston 2 on the valve stem 1 allows for easy maintenance.

[0025] It can be understood that, compared with the method of integrally processing the piston 2 and the valve stem 1 in the prior art, by locking the piston 2 through the retaining spring 4 and the retaining block 3, the valve stem 1 can be continued to be used while the piston 2 is replaced, thereby greatly reducing the maintenance cost of the valve.

[0026] Working principle: During assembly, first insert the piston 2 into the valve stem 1, and use the clamping block 3 to fix the position of the top and bottom of the piston 2. The fitting part 31 of the clamping block 3 is embedded in the clamping groove 11, and then the clamping block 3 is locked by the retaining spring 4, so that the clamping block 3 is fixed on the valve stem 1, thereby fixing the piston 2 on the valve stem 1. When replacing the piston 2, first use the retaining spring pliers to remove the retaining spring 4, then take out the clamping block 3, so that the piston 2 slides out from the valve stem 1, and continues to use it after replacing the new piston 2.

[0027] In summary, although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve piston connection structure, suitable for a valve, characterized in that: include: A valve stem (1), wherein the valve stem (1) is sleeved with a piston (2), the valve stem (1) is connected to a clamping block (3), and the clamping block (3) is arranged at the top and bottom of the piston (2); The clamping block (3) is connected to a clamping spring (4), and the clamping spring (4) cooperates with the clamping block (3) to fix the piston (2).

2. A valve piston connection structure according to claim 1, characterized in that: The valve stem (1) is provided with a clamping groove (11).

3. A valve piston connection structure according to claim 2, characterized in that: The clamping block (3) is composed of two separate semicircular ring-shaped iron blocks.

4. A valve piston connection structure according to claim 3, characterized in that: The inner ring of the iron block is provided with an engaging portion (31).

5. The valve piston connection structure according to claim 3, characterized in that: The outer ring of the iron block is provided with a clamping portion (32).

6. A valve piston connection structure according to claim 4, characterized in that: The engaging portion (31) is arranged in the card slot (11).

7. The valve piston connection structure according to claim 5, characterized in that: The inner ring of the clamping spring (4) is in close contact with the clamping portion (32).

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