A double plate ball valve

Abstract

The present invention discloses a double-plate ball valve, comprising: a valve body; a ball plate support seat arranged in the valve body; a new type of ball fixed inside the valve body by an upper valve stem and a lower valve stem; a ball panel arranged on the left and right sides of the new type of ball; a track plate fixed to the upper and lower ends of the new type of ball by screws; a left support rod and a right support rod matched with the lower valve stem; and a sealing valve seat is arranged at the valve body portion corresponding to the ball sealing surface at the outer edge of the ball panel. The advantages of the present invention are: (1) the lower valve stem is fixed by two left and right support rods and does not pass through the valve body, thereby reducing the leakage point at the lower valve stem portion; (2) during the rotation of the switch, the double-plate ball surface and the valve seat sealing surface do not contact and rub, and will not cause scratches or wear on the valve seat sealing surface during rotation, thereby increasing the overall service life and can be used as a simple adjustment; (3) reducing costs, saving space, and avoiding damage to the valve seat sealing surface by impurities attached to the ball surface during the stroke.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and more particularly to a double-plate ball valve and a new type of valve for controlling the switching or regulation of fluid in a pipeline. Background Art

[0002] The original fixed ball valve has a ball in the middle cavity of the valve body, and the valve body is fixedly connected by upper and lower valve stems. Sealing valve seats are provided at both ends of the ball. The surface of the ball is made of a whole arc smooth surface. This is too large and occupies a lot of space. It is too heavy and the cost is high. During the switching process and in the closed state, the ball surface and the valve seat sealing surface are in a state of close friction. The friction of the entire ball surface causes large torque, large wear of the valve seat, and reduced seal service life.

[0003] Therefore, how to provide a double-plate ball valve with small size, low cost, extended service life, and the ability to avoid damage to the valve seat sealing surface by impurities attached to the spherical surface during the stroke is an urgent problem that technical personnel in this field need to solve. Summary of the invention

[0004] In view of this, the present invention provides a double-plate ball valve which has the characteristics of small size, low cost, extended service life, and can prevent impurities attached to the spherical surface from damaging the valve seat sealing surface during the stroke.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A double-plate ball valve comprises: a valve body; a ball plate support seat arranged in the valve body; a new type of sphere fixed to the inside of the valve body by an upper valve stem and a lower valve stem; a ball panel arranged on the left and right sides of the new type of sphere; a track plate fixed to the upper and lower ends of the new type of sphere by screws; a left support rod and a right support rod matching the lower valve stem; a sealing valve seat is provided at the valve body portion corresponding to the sphere sealing surface on the outer edge of the ball panel; a sealing ring and a spring are also provided behind the sealing valve seat to assist in sealing; it is characterized in that it also comprises: the lower valve stem is fixed to the lower valve stem support seat at the lower end, support holes are provided on the left and right sides of the lower valve stem support seat, the left support rod and the right support rod are respectively inserted into the corresponding support holes, and the sealing ring is then tightened by the side fastening ring.

[0007] Preferably, in the above-mentioned double-plate ball valve, the valve body is connected in a split type or in an integral pipe-welded type.

[0008] Preferably, in the above-mentioned double-plate ball valve, the ball plate support seat in the valve body is integrally connected with the left and right ball plate panels, and the edge of the ball plate panel is processed into a ball sealing surface to form the new ball.

[0009] Preferably, in the above-mentioned double-plate ball valve, the circular portion at the upper middle end of the upper valve stem is filled with filler, and is compressed and sealed by a pressure cover and a pressure ring in sequence, and then tightened and fixed by bolts and nuts.

[0010] Preferably, in the above-mentioned double-plate ball valve, a track docking surface corresponding to the track disc is provided at a position of the outer edge of the sealing valve seat close to the ball plate supporting seat.

[0011] Preferably, in the above-mentioned double-plate ball valve, a main seal and a secondary seal are provided at a position corresponding to the position of the ball sealing surface.

[0012] Preferably, in the above-mentioned double-plate ball valve, a track disk seat surface is provided between the upper valve stem, the lower valve stem and the ball plate surface, and a plurality of screw holes are provided on the track disk seat surface, and the track disks at both ends are fastened to the ball plate support seats at both ends by tightening the screws thereon to form a set of closing parts.

[0013] It can be seen from the above technical solution that, compared with the prior art, the present invention is beneficial in that:

[0014] 1. The overall volume is reduced, saving space, saving costs and reducing weight;

[0015] 2. The lower valve stem is fixed by two left and right support rods, which do not pass through the valve body, thus reducing the leakage point at the lower valve stem;

[0016] 3. During the rotation of the switch, the double-plate spherical surface does not contact or rub against the valve seat sealing surface, which will not cause scratches or wear on the valve seat sealing surface during rotation. In this way, the sealing surface is not only safely protected, but also has a greatly increased service life due to the lack of friction and wear, and can be used as a simple adjustment;

[0017] 4. Reduce costs, save space and increase service life to avoid damage to the valve seat sealing surface caused by impurities attached to the spherical surface during the stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 The accompanying drawing is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 The accompanying drawing is a partial enlarged view of A-1 of the present invention.

[0021] Figure 3The accompanying drawing is a front view of the novel sphere of the present invention.

[0022] Figure 4 The accompanying drawing is a side view of the novel sphere of the present invention.

[0023] Figure 5 The accompanying drawing is a top view of the novel sphere of the present invention.

[0024] Figure 6 The accompanying drawing is a front view of the sealing valve seat of the present invention.

[0025] Figure 7 The accompanying drawing is a rear view of the sealing valve seat of the present invention.

[0026] Figure 8 The accompanying drawing is a cross-sectional view of the sealing valve seat of the present invention.

[0027] Fig. 9 The accompanying drawing is a cross-sectional view of the lower valve stem of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The embodiment of the invention discloses a double-plate ball valve which has the characteristics of small size, low cost, extended service life and can prevent the impurities attached to the spherical surface from damaging the valve seat sealing surface during the stroke.

[0030] Please refer to the attached drawings, which are a double-plate ball valve disclosed by the present invention, specifically comprising:

[0031] Valve body 1; a ball plate support seat 2 is arranged in the valve body 1; a new ball 5 is fixed inside the valve body 1 through an upper valve stem 3 and a lower valve stem 4; a ball panel 51 is arranged on the left and right sides of the new ball 5; a track plate 6 is fixed to the upper and lower ends of the new ball 5 through screws 52; a left support rod 41 and a right support rod 42 are matched with the lower valve stem 4; wherein, a sealing valve seat 7 is arranged at the valve body portion corresponding to the ball sealing surface 53 on the outer edge of the ball panel 51; a sealing ring 8 and a spring 9 are also arranged behind the sealing valve seat 7, which is used to

[0032] Auxiliary seal; it is characterized in that it also includes: the lower valve stem 4 is fixed on the lower valve stem support seat 43 at the lower end, and support holes are provided on the left and right sides of the lower valve stem support seat 43, and the left support rod 41 and the right support rod 42 are respectively inserted into the corresponding support holes, and then the sealing ring is tightened by the side fastening ring.

[0033] In order to further optimize the above technical solution, the valve body 1 can adopt a split connection or a pipe-welded integral type; among them, the pipe-welded integral type has better overall sealing reliability; the integral welding does not have the problem of aging of gasket connection materials. In addition, the valve body is provided with a leakage point, and the connection forms at both ends can be various forms of connection such as flanges, welding, threads, and ferrules.

[0034] In order to further optimize the above technical solution, the ball plate support seat 2 in the valve body 1 is connected to the left and right ball panels as a whole, and the edge of the ball panel 51 is processed into a ball sealing surface 53 to form the new ball 5.

[0035] In order to further optimize the above technical solution, the upper middle circular part of the upper valve stem 3 is filled with packing 31, and is sealed by a gland 32 and a ring 33 in sequence, and then tightened and fixed by bolts 34 and nuts 35 (or other methods).

[0036] In order to further optimize the above technical solution, a track docking surface 13 corresponding to the track plate 6 is provided at the outer edge of the sealing valve seat 7 near the ball plate support seat 2 .

[0037] In order to further optimize the above technical solution, a main seal 11 and a secondary seal 12 are provided at a position corresponding to the position of the ball sealing surface 53 .

[0038] In order to further optimize the above technical solution, a track disc seat surface 13 is provided between the upper valve stem 3, the lower valve stem 4 and the ball panel 51, and a plurality of screw holes 14 are provided on the track disc seat surface 13. By tightening the screws 52 thereon (or other methods), the track discs 6 at both ends are fastened to the ball plate support seats 2 at both ends to form a set of closing parts.

[0039] In order to further optimize the above technical solution, the valve body 1, the new ball 5, the upper valve stem 3 and the lower valve stem 4 are preferably made of high-strength carbon casting, forged steel, cast iron, stainless steel, copper and other metal materials.

[0040] In order to further optimize the above technical solution, the sealing valve seat 7 and other sealing parts are preferably made of soft materials such as graphite, rubber, brass, etc. In hard sealing or special circumstances, metal materials can also be used. According to the requirements of working conditions, the materials can be reasonably and flexibly matched.

[0041] In order to further optimize the above technical solution, the valve can be controlled manually or by pneumatic, electric, hydraulic or other control methods with actuators.

[0042] In order to further optimize the above technical solution, two upper and lower ball plate support seats 2 are provided in the middle cavity of the valve body 1. The outer edge of the ball plate support seat 2 is connected to the two ball panels 51 as a whole. The edges of the ball panels 51 on both sides are respectively processed into spherical smooth surfaces as the ball sealing surface 53. The whole is a spherical concentric new sphere 5.

[0043] In order to further optimize the above technical solution, a valve stem hole 21 is provided in the middle of the ball plate support seat 2, and the left support rod 41 is inserted into the support hole at the lower end of the left side of the lower valve stem 4 and the corresponding valve body 1, and the other end is inserted into the support hole on the left side of the lower valve stem 4. The lower valve stem 4 is inserted into the ball plate support seat 2 and then the right support rod 42 is inserted into the support hole of the lower valve stem 4, and the other end is inserted into the support hole at the lower end of the right support seat, and then the sealing ring is tightened by a threaded fastening ring.

[0044] In order to further optimize the above technical solution, the lower valve stem 4 and the ball plate support seat 2 at the lower end can rotate flexibly; the ball plate support seat 2 at the upper end is inserted by the polygonal part of the upper valve stem 3, and the upper middle circular part of the upper valve stem 3 is filled with filler 31, and is pressed and sealed with a pressure cover 32 and a pressure ring 33 in sequence, and then tightened and fixed by bolts 34 and nuts 35. The upper end can be connected to an electric head, a pneumatic head, a turbine and other control methods for operation, and the new ball is driven by rotating the valve stem (the ball plate support seat together with the ball panel) for switching or adjustment.

[0045] In order to further optimize the above technical solution, a sealing valve seat 7 is provided at the valve body portion corresponding to the spherical sealing surface 53 on the outer edge of the spherical panel 51 at both ends, and the sealing valve seat 7 is set as a sealing surface close to the spherical surface on the outer edge of the spherical panel, and a sealing ring 8 and a spring 9 are provided behind the sealing valve seat 7 to assist sealing.

[0046] In order to further optimize the above technical scheme, the specific working principle is as follows: when the transmission opening and closing part is opened, the rotating track disk and the track docking surface are gradually pushed apart, pushing the sealing valve seat open, so that the sealing surface of the sealing valve seat and the sealing surface of the ball panel are separated, and they are still in a separated state after opening; when the transmission opening and closing part is closed, when it is close to the fully closed position, the track docking surface is close to the notch of the track disk, so that the track disk and the track docking surface are gradually separated, and the sealing surface of the ball panel and the sealing surface on the sealing valve seat are gradually contacted and pressed, and under the push of the spring and the medium pressure, they are tightly sealed. The greater the medium pressure, the greater the thrust generated, and the better the sealing performance.

[0047] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0048] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-plate ball valve, comprising: Valve body; a ball plate support seat is arranged in the valve body; a new type of sphere fixed inside the valve body by an upper valve stem and a lower valve stem; a ball panel arranged on the left and right sides of the new type of sphere; a track plate fixed to the upper and lower ends of the new type of sphere by screws; a left support rod and a right support rod matching the lower valve stem; wherein a sealing valve seat is arranged at the valve body portion corresponding to the sphere sealing surface on the outer edge of the ball panel; a sealing ring and a spring are also arranged behind the sealing valve seat to assist in sealing; it is characterized in that it also includes: the lower valve stem is fixed to the lower valve stem support seat at the lower end, support holes are arranged on the left and right sides of the lower valve stem support seat, the left support rod and the right support rod are respectively inserted into the corresponding support holes, and then the sealing ring is compressed by the side fastening ring; The outer edge of the sealing valve seat is provided with a track docking surface corresponding to the track disc at a position close to the ball plate support seat; A main seal and a secondary seal are provided at a position corresponding to the sealing surface of the ball; A track plate seat surface is provided between the upper valve stem, the lower valve stem and the ball plate, and a plurality of screw holes are provided on the track plate seat surface, and screws are tightened thereon to fasten the track plates at both ends to the ball plate support seats at both ends to form a set of closing parts; The support holes, the left support rod and the right support rod on both sides of the lower valve stem support seat are respectively pressed against the side valve walls on the left and right sides.

2. A double plate ball valve according to claim 1, characterized in that: The valve body is connected in a split type or a pipe-welded integral type.

3. A double plate ball valve according to claim 1, characterized in that: The ball plate support seat in the valve body is connected to the left and right ball panels as a whole, and the edges of the ball panels are processed into ball sealing surfaces to form the new ball.

4. A double plate ball valve according to claim 1, characterized in that: The circular part at the upper middle end of the upper valve stem is filled with filler, and is pressed and sealed by a gland and a ring in sequence, and then tightened and fixed by bolts and nuts.

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