Novel combined double-one-way valve of pipe-making hydraulic press

Abstract

The utility model relates to the technical field of valve structures, in particular to a novel pipe-making hydraulic press combined double-check valve which comprises a valve body, a water inlet is formed in the bottom of the valve body, a water outlet is formed in the front face of the valve body, a first-stage cavity is formed downwards in the top of the valve body, a second-stage cavity is formed inwards in one side wall of the valve body, and valve element assemblies are installed in the two cavities. The water inlet, the first-stage cavity, the second-stage cavity and the water outlet are sequentially communicated through flow channels, the valve element assembly comprises a valve seat, a valve clack and a valve sleeve, and an elastic mechanism connected with the valve clack is arranged in the valve sleeve. According to the novel combined double one-way valve of the pipe-making hydraulic press, through cooperation of the elastic mechanism and the valve clack, a two-stage switch can be formed in the valve body to control water outlet and closing of the valve body, in the closing state, the sealing performance can be improved through the two-stage switch, air in a flow channel can be reduced as much as possible through air exhaust of a bronze drum vacuum opening, and the sealing performance of the valve body is improved. And air is prevented from entering the system.

Description

Technical Field

[0001] The utility model relates to the technical field of valve structures, in particular to a novel combined double-check valve for a pipe-making hydraulic press. Background Art

[0002] A hydraulic press is a machine that uses oil-water balance control to perform hydrostatic tests on steel pipes. It is mainly composed of the following parts: a steel pipe conveying device, a water system, an oil system and a control system. The steel pipe conveying device is responsible for the in and out transmission of steel pipes. The water system is responsible for filling water into the steel pipe to pressurize it during the hydrostatic test. The oil system is responsible for controlling the head to achieve oil-water pressure balance at the pipe end during the hydrostatic test. The control system is responsible for automatic operation control of the entire equipment, automatic storage of test data and management of historical data.

[0003] At present, most hydraulic presses use an oil circuit system control, and a one-way valve is used to control the oil circuit entering the system, which will make the derived flow rate block and the oil intake unstable. At the same time, when the valve is closed, the sealing setting method is relatively simple, resulting in insufficient sealing performance. Utility Model Content

[0004] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a new type of combined double-check valve for a pipe making hydraulic press, comprising a valve body, a water inlet is provided at the bottom of the valve body, a water outlet is provided at the front, a primary cavity is formed downwardly at the top of the valve body, a secondary cavity is formed inwardly at one side wall of the valve body, valve core assemblies are installed in both cavities, the water inlet, the primary cavity, the secondary cavity and the water outlet are connected in sequence through flow channels, the valve core assembly comprises a valve seat, a valve disc and a valve sleeve, and an elastic mechanism connected to the valve disc is provided inside the valve sleeve.

[0005] Furthermore, the elastic mechanism comprises a spring tube installed in the valve sleeve, and a top column fixedly connected to the valve disc is arranged inside the spring tube.

[0006] Furthermore, a guide sleeve is provided on the outer side of the valve disc and is fixed inside the cavity.

[0007] Furthermore, a valve cover is installed on the outside of each cavity to seal the cavity.

[0008] Furthermore, a vacuum port is provided on the other side wall of the valve body, a ring-shaped port is provided in the guide sleeve, and a channel connected to the ring-shaped port is symmetrically opened in the middle of the guide sleeve, wherein the vacuum port is connected to the primary cavity, the channel of the valve core assembly, and the secondary cavity in sequence.

[0009] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0010] This new type of pipe-making hydraulic press combines double one-way valves, which can form a two-stage switch inside the valve body through the cooperation of the elastic mechanism and the valve disc to control the water outflow and closure of the valve body. In the closed state, the two-stage switch can improve the sealing performance, and the vacuum port of the copper drum can be used to draw air, which can minimize the air in the flow channel and prevent air from entering the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle;

[0013] Figure 3 For this utility model Figure 1 Right side cross-sectional view.

[0014] In the figure: 1. valve body; 2. valve cover; 4. valve seat; 5. valve disc; 6. guide sleeve; 7. valve sleeve; 8. spring cylinder; 9. top column; B. water inlet; C. vacuum port; D. water outlet. DETAILED DESCRIPTION

[0015] 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.

[0016] See also Figure 1-3 A novel combined double-check valve for a pipe-making hydraulic press in this embodiment comprises a valve body 1, a water inlet B is provided at the bottom of the valve body 1, a water outlet C is provided at the front, a primary cavity is formed downwardly at the top of the valve body 1, a secondary cavity is formed from the right side of the valve body 1 to the left, valve core assemblies are installed in both cavities, the water inlet B, the primary cavity, the secondary cavity and the water outlet C are connected in sequence through a flow channel, the valve core assembly comprises a valve seat 4, a valve flap 5 and a valve sleeve 7, and an elastic mechanism connected to the valve flap 5 is arranged inside the valve sleeve 7.

[0017] In the above structure, a two-stage switch is formed by the cooperation of the elastic mechanism and the valve disc. When liquid enters from the water inlet and the water pressure rises to a certain pressure, the first valve disc is pushed open to flow in, and then the second valve disc is pushed to introduce into the system. The two-stage one-way valve can buffer the water pressure and also form a closure through the two stages to improve the sealing of the valve body.

[0018] The elastic mechanism includes a spring barrel 8 installed inside the valve sleeve 7, and the spring barrel 8 is movably connected to a top column 9 fixedly connected to the valve disc 5. The pressure of the liquid entering can push the top column into the spring barrel by pushing the valve disc, squeezing the spring in the spring barrel, and the valve disc retreats to connect the channel with the flow channel, and then the secondary elastic mechanism is also pushed back to complete the liquid inlet operation. When the water inlet is closed, the valve disc is driven back by the top column under the elastic force of the spring barrel to complete the closure, and then the sealing is improved under the action of the two-stage elastic mechanism.

[0019] In addition, a guide sleeve 6 fixed inside the cavity is provided on the outer side of the valve flap 5. The guide sleeve serves to limit the position of the valve flap, so that the valve flap maintains vertical movement and prevents the valve flap from deflecting.

[0020] In addition, as a preferred structure, a vacuum port D is provided on the left side of the valve body 1, a circle of annular opening is provided in the guide sleeve 6, and a channel connected to the annular opening is symmetrically opened in the middle of the guide sleeve 6, wherein the vacuum port D is connected to the primary cavity, the channel of the valve core assembly, and the secondary cavity in sequence.

[0021] Before filling the water inlet, first extract air through the vacuum port, then fill water from the water inlet to push the valve core assembly to move, so that the left and right sides of the primary cavity and the bottom flow channel are filled with liquid, minimizing the amount of air in the flow channel entering the system; then close the vacuum port, and continue to fill the water inlet with liquid, so that the valve core assembly in the secondary cavity can be pushed open to complete the liquid filling of the system.

[0022] Wherein, a valve cover 2 for sealing the cavity is installed on the outside of each cavity. By opening the valve cover, it is convenient to remove, replace or maintain the internal valve disc and other parts.

[0023] It should be noted that in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0024] 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 novel combined double check valve for a pipe making hydraulic press, comprising a valve body (1), characterized in that: The valve body (1) is provided with a water inlet (B) at the bottom and a water outlet (C) at the front. A primary cavity is formed downwardly at the top of the valve body (1), and a secondary cavity is formed inwardly at a side wall of the valve body (1). Valve core components are installed in both cavities. The water inlet (B), the primary cavity, the secondary cavity and the water outlet (C) are connected in sequence through a flow channel. The valve core component includes a valve seat (4), a valve flap (5) and a valve sleeve (7). An elastic mechanism connected to the valve flap (5) is arranged inside the valve sleeve (7).

2. A novel combined double check valve for a pipe making hydraulic press according to claim 1, characterized in that: The elastic mechanism comprises a spring cylinder (8) installed in the valve sleeve (7), and a top column (9) fixedly connected to the valve flap (5) is arranged inside the spring cylinder (8).

3. A novel combined double check valve for a pipe making hydraulic press according to claim 2, characterized in that: The outer side of the valve flap (5) is provided with a guide sleeve (6) which is located and fixed inside the cavity.

4. A novel combined double check valve for a pipe making hydraulic press according to claim 1, characterized in that: A valve cover (2) is installed on the outside of each cavity to seal the cavity.

5. A novel combined double check valve for a pipe making hydraulic press according to claim 3, characterized in that: The other side wall of the valve body (1) is provided with a vacuum port (D), the guide sleeve (6) has a circle of annular ports inside, and the middle part of the guide sleeve (6) is symmetrically provided with a channel connected to the annular port, wherein the vacuum port (D) is connected to the primary cavity, the channel of the valve core assembly, and the secondary cavity in sequence.

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