Valve core of stop valve

Abstract

The utility model discloses a valve core of a stop valve, which comprises a piston rod, a spring and a plunger head, a groove for loading the spring and the plunger head is arranged at the end part of the piston rod, the plunger head is connected with a valve rod, the valve rod is connected in the groove in a sliding manner, and the spring is sleeved on the outer wall of the valve rod. Especially for application scenes needing to treat coatings containing solid particles, the problem of sealing failure existing in a traditional cut-off structure can be effectively solved, and equipment failures and maintenance cost caused by sealing failure are reduced. Under the condition that solid particles exist at the suction inlet, the plunger head can crush the particles through the acting force of the piston rod, so that the particles are prevented from being clamped in a gap between the plunger head and the pump base, and it is guaranteed that the plunger head is tightly attached to the pump base. The hidden arrangement of the spring not only shortens the length of the whole structure, but also effectively prevents the problem that the spring is stuck due to the fact that the coating flows into the spring.

Description

Technical Field

[0001] The utility model belongs to the technical field of stop valves, and in particular relates to a stop valve core. Background Art

[0002] The current cut-off structure consists of three main parts: piston rod, spring and plunger head. When there are solid particles at the suction port (such as solid particles in real stone paint, fire retardant paint, cement mortar and other coatings), these particles are stuck in the gap between the plunger head and the suction port, resulting in the formation of one or more sealing gaps, which makes it impossible for the paint to be sucked into the paint cylinder when the machine pulls the piston rod up and down. Therefore, the original sealing structure is destroyed and the plunger head cannot fit tightly with the suction port. Once a failure occurs, manual intervention must be carried out to disassemble and clean the equipment. Utility Model Content

[0003] In order to solve the problems raised in the above-mentioned background technology, the utility model provides the following technical solutions: a stop valve core, including a piston rod, a spring, and a plunger head, the end of the piston rod is provided with a groove for loading the spring and the plunger head, the plunger head is connected to a valve stem, the valve stem is slidably connected in the groove, and the spring is sleeved on the outer wall of the valve stem.

[0004] Furthermore, the piston rod is provided with a limiting groove matched with the valve stem, and the limiting groove is communicated with the groove.

[0005] Furthermore, two ends of the spring are respectively in contact with the plunger head and the end of the piston rod.

[0006] Furthermore, two ends of the spring are respectively in contact with the plunger head and the bottom wall of the groove.

[0007] Furthermore, the plunger head is detachably connected to the valve stem.

[0008] Furthermore, the plunger head is integrally arranged or fixedly connected to the valve stem.

[0009] Furthermore, the plunger head is spherical or hemispherical.

[0010] The beneficial effects of the utility model are as follows: the structure is suitable for various paint pumping systems, especially for application scenarios that require processing paint containing solid particles, and can effectively solve the sealing failure problem existing in the traditional cut-off structure and reduce equipment failure and maintenance costs caused by sealing failure. In the case of solid particles at the suction port, the present solution can use the force of the piston rod to break these particles, thereby preventing the particles from being stuck in the gap between the plunger head and the pump seat, and ensuring a close fit between the plunger head and the pump seat. In addition, the hidden placement of the spring not only shortens the length of the overall structure, but also effectively prevents the paint from flowing into the interior of the spring and causing the spring to get stuck. The detachable connection design between the plunger head and the valve stem makes production and assembly more convenient, and also facilitates later debugging and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional diagram of the first embodiment;

[0012] Figure 2 It is a half-section schematic diagram of the first embodiment;

[0013] Figure 3 It is a three-dimensional diagram of the second embodiment;

[0014] Figure 4 It is a half-section schematic diagram of the second embodiment;

[0015] Figure 5 This is a half-section schematic diagram of the third embodiment;

[0016] Figure 6 It is a half-section schematic diagram of the fourth embodiment;

[0017] Figure 7 is a first stereogram of Embodiment 5;

[0018] Figure 8 It is a first half cross-sectional schematic diagram of Embodiment 5;

[0019] Fig. 9 It is a second stereogram of Embodiment 5;

[0020] Fig.10 It is a second half cross-sectional schematic diagram of Embodiment 5;

[0021] Fig.11 This is a third half cross-sectional schematic diagram of the fifth embodiment;

[0022] Fig.12 This is a fourth half-section schematic diagram of the fifth embodiment.

[0023] The meaning of the numbers in the figure are: 1-piston rod; 2-spring; 3-plunger head; 4-groove; 5-valve stem. DETAILED DESCRIPTION

[0024] 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.

[0025] Embodiment 1

[0026] See also Figure 1-2 The utility model provides the following technical solutions: a stop valve core, including a piston rod, a spring, and a plunger head. The end of the piston rod is provided with a groove for loading the spring and the plunger head. The plunger head is connected to a valve stem, and the valve stem is slidably connected in the groove. The spring is sleeved on the outer wall of the valve stem; the two ends of the spring are respectively in contact with the ends of the plunger head and the piston rod; the plunger head is spherical.

[0027] In the above structure, the elastic potential energy of the spring is used to drive the plunger head to move, and the valve stem is slidably connected in the groove, which can effectively limit the moving direction and path of the plunger head and ensure that the plunger head is pressed into the suction port; when there are solid particles at the pump port of the pump seat (such as solid particles in real stone paint, fire retardant paint, cement mortar and other coatings), under the action of the piston rod, the plunger head can crush the solids to avoid disassembly and cleaning during operation.

[0028] In this embodiment, the plunger head is integrally arranged or fixedly connected to the valve stem.

[0029] The above structure can effectively ensure that the connection between the plunger head and the valve stem will not be accidentally disconnected.

[0030] Embodiment 2

[0031] Based on Example 1, please refer to Figure 3-4 The piston rod is provided with a limiting groove adapted to the valve stem, the limiting groove is communicated with the groove, and the two ends of the spring are respectively in contact with the plunger head and the bottom wall of the groove.

[0032] In the above structure, the spring is hidden in the groove, which can effectively shorten the overall length of the structure, and the limiting groove is used to limit the moving path and direction of the plunger head.

[0033] Embodiment 3

[0034] Based on Example 1, please refer to Figure 5 , the plunger head is detachably connected to the valve stem.

[0035] The above structure is easy to manufacture and assemble, and can be manufactured in a modular manner to simplify the production process; it is easy to debug and repair. If problems occur during the assembly process, or if repairs are needed during use, the problematic components can be easily disassembled and replaced.

[0036] Embodiment 4

[0037] Based on Example 2, please refer to Figure 6 , the plunger head is detachably connected to the valve stem.

[0038] The above structure is easy to manufacture and assemble, and can be manufactured in a modular manner to simplify the production process; it is easy to debug and repair. If problems occur during the assembly process, or if repairs are needed during use, the problematic components can be easily disassembled and replaced.

[0039] Embodiment 5

[0040] Based on any one of embodiments 1 to 4, the plunger head is hemispherical.

[0041] In the above structure, the plunger head is hemispherical, which can reduce the volume of the plunger head while ensuring the fit between the plunger head and the pump seat.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stop valve core, comprising a piston rod, a spring, and a plunger head, wherein the end of the piston rod is provided with a groove for loading the spring and the plunger head, characterized in that: The plunger head is connected with a valve stem, the valve stem is slidably connected in the groove, and the spring is sleeved on the outer wall of the valve stem.

2. A stop valve core according to claim 1, characterized in that: The piston rod is provided with a limiting groove matched with the valve stem, and the limiting groove is communicated with the groove.

3. The stop valve core according to claim 1, characterized in that: The two ends of the spring are respectively in contact with the plunger head and the end of the piston rod.

4. The stop valve core according to claim 1, characterized in that: The two ends of the spring are respectively in contact with the plunger head and the bottom wall of the groove.

5. The stop valve core according to claim 1, characterized in that: The plunger head is detachably connected to the valve stem.

6. The stop valve core according to claim 1, characterized in that: The plunger head is integrally arranged with or fixedly connected to the valve stem.

7. The stop valve core according to claim 1, characterized in that: The plunger head is spherical or hemispherical.

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