High-performance ultralow-temperature large axial-flow check valve steel casting

Abstract

The high-performance ultralow-temperature large axial-flow type check valve steel casting comprises a steel casting body, the steel casting body comprises a left steel casting body, a middle steel casting body and a right steel casting body, a first positioning groove is formed in the right end of the left steel casting body, and a second positioning groove is formed in the left end of the right steel casting body. A plurality of first sealing ring mounting grooves are formed in the inner wall surface, aligned to the first positioning groove, of the left end of the middle steel casting, and a plurality of second sealing ring mounting grooves are formed in the inner wall surface, aligned to the second positioning groove, of the right end of the middle steel casting; a first connecting flange is integrally arranged at the right end of the left steel casting, a second connecting flange is integrally arranged at the left end of the right steel casting, a plurality of fixing bolts are arranged between the first connecting flange and the second connecting flange, and the left steel casting, the middle steel casting and the right steel casting are fixedly connected through the fixing bolts. The technical scheme is reasonable in structural design, easy to manufacture, convenient to carry and good in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to check valve technical field, concretely relates to a high performance super low temperature large -scale axial flow check valve cast steel piece. BACKGROUND

[0002] Axial flow check valve, also known as straight check valve or single piece off seat check valve, is a valve device installed in pipeline system, mainly used for preventing medium from flowing in reverse in pipeline. The design of this valve allows fluid to flow in one direction and automatically closes when fluid flows in reverse, thereby preventing reverse flow.

[0003] The working principle of axial flow check valve is based on the pressure difference of medium. When fluid enters the valve in the normal flow direction, the valve disc will automatically open, and the medium can flow freely through the valve. But when the medium flows in reverse, the valve disc will be affected by the reverse pressure and close to prevent reverse flow. The opening and closing of the valve disc of the axial flow check valve is determined by the pressure difference between the inlet end and the outlet end. When the inlet end pressure is greater than the sum of the outlet end pressure and spring force, the valve disc opens. When the sum of the outlet end pressure and spring force is greater than the inlet end pressure, the valve disc closes.

[0004] Axial flow check valve is mainly composed of valve body, valve cover, valve disc, spring and other components. The valve body is the main part of the valve, which is internally provided with a flow guide and a valve seat for guiding the flow of fluid. The valve disc of the axial flow check valve has a small mass, which reduces the friction force on the guide surface, and the valve disc can quickly reseat. The small mass and low inertia valve disc passes through a short stroke and contacts the valve seat surface with very small impact force, so that the axial flow check valve can avoid damage to the valve seat sealing surface and prevent valve seat leakage.

[0005] However, the shell of the existing super low temperature large-scale axial flow check valve is generally an integral cast steel part. The cast steel part with such an integral structure has unreasonable structure design, is difficult to manufacture and inconvenient to carry. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies in the prior art, the utility model aims to provide a high performance super low temperature large-scale axial flow check valve cast steel part with reasonable structure design, easy manufacturing, convenient carrying and good practicality.

[0007] To achieve the above object, the utility model provides the following technical scheme: A high performance super low temperature large -scale axial -flow check valve cast steel piece, including cast steel piece body, the cast steel piece body includes left cast steel piece, middle cast steel piece and right cast steel piece, the left cast steel piece right end is provided with first locating groove, the right cast steel piece left end is provided with second locating groove, the middle cast steel piece left end inserts into first locating groove, the middle cast steel piece right end inserts into second locating groove, the middle cast steel piece left end is provided with a plurality of first sealing ring installation groove in the position of the inner wall surface of first locating groove, and the middle cast steel piece right end is provided with a plurality of second sealing ring installation groove in the position of the inner wall surface of second locating groove,

[0008] The right end of the left cast steel piece is integrally provided with a first connecting flange, the left end of the right cast steel piece is integrally provided with a second connecting flange, a plurality of fixing bolts are arranged between the first connecting flange and the second connecting flange, and the left cast steel piece, the middle cast steel piece and the right cast steel piece are connected and fixed through the fixing bolts.

[0009] The utility model further sets up: the middle part of the middle cast steel piece is provided with medium through -hole, the medium through -hole middle part is provided with the axle seat, a plurality of support rods are fixedly arranged between the inner wall surface of medium through -hole and the axle seat, the axle seat middle part is axially provided with a positioning shaft, and the right end of the positioning shaft is fixedly connected or detachably connected with the axle seat.

[0010] The utility model further sets up: the left end of the middle cast steel piece is fixedly provided with the valve seat, and the left end surface of the valve seat is fixedly provided with an elastic sealing layer.

[0011] The utility model further sets up: the left cast steel piece is provided with liquid outlet passage, the middle part of the liquid outlet passage is provided with spring positioning seat, a plurality of support frames are arranged between the inner wall surface of the liquid outlet passage and the spring positioning seat, the right end of the spring positioning seat is provided with a spring installation groove with the opening facing right, a spring positioning clamping groove is arranged on the left inner wall surface of the spring installation groove, an axial through -hole is axially arranged in the middle part of the spring positioning seat, and the axial center line of the axial through -hole is aligned with the axial center line of the positioning shaft.

[0012] The utility model further sets up: the number of support rods is 2-4, and the axle seat, the support rod and the middle cast steel piece are integrally arranged, the right end of the positioning shaft is integrally arranged with the axle seat or is fixedly connected through a bolt.

[0013] The utility model further sets up: the number of support frames is 1-4, and the support frame, the spring positioning seat and the left cast steel piece are integrally arranged.

[0014] The utility model discloses an advantageous effect is: compared with prior art, the utility model discloses reasonable structure design, cast steel spare body includes left cast steel spare, middle cast steel spare and right cast steel spare, and left cast steel spare, middle cast steel spare and right cast steel spare are fixed through fixed bolt connection between fixed.

[0015] The utility model will be further described below in conjunction with the drawings and specific embodiments. DRAWINGS

[0016] Figure 1 It is structure schematic diagram of the utility model embodiment;

[0017] Figure 2 It is sectional view schematic diagram of the utility model embodiment;

[0018] Figure 3 It is sectional view schematic diagram of left cast steel spare of the utility model embodiment;

[0019] Figure 4 It is sectional view schematic diagram of middle cast steel spare in the utility model embodiment;

[0020] Figure 5 It is sectional view schematic diagram of right cast steel spare of the utility model embodiment. DETAILED DESCRIPTION

[0021] In the description of the embodiment, it needs to be explained that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back" and the like appear, the orientation or position relation that it indicates is based on the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not indicated or implied that the indicated device or element must have a particular orientation, is constructed and operated with a particular orientation, therefore, can not be understood as the limitation to the utility model. In addition, if the terms "first", "second", "third" appear, only for the description purpose, and can not be understood as indicating or implying relative importance.

[0022] Refer to Figures 1 to 5The utility model discloses a high performance ultralow temperature large -scale axial -flow check valve cast steel piece, including cast steel piece body, the cast steel piece body includes left cast steel piece 1, middle cast steel piece 2 and right cast steel piece 3, the left cast steel piece 1 right end is provided with first locating recess 11, the right cast steel piece 3 left end is provided with second locating recess 31, the middle cast steel piece 2 left end inserts first locating recess 11, the middle cast steel piece 2 right end inserts second locating recess 31, the middle cast steel piece 2 left end alignment first locating recess 11's inner wall surface position is provided with a plurality of first sealing ring installation groove 21, and the middle cast steel piece 2 right end alignment second locating recess 31's inner wall surface position is provided with a plurality of second sealing ring installation groove 22,

[0023] The right end of the left cast steel piece 1 is integrally provided with a first connecting flange 12, the left end of the right cast steel piece 3 is integrally provided with a second connecting flange 32, a plurality of fixing bolts 4 are arranged between the first connecting flange 12 and the second connecting flange 32, and the left cast steel piece 1, the middle cast steel piece 2 and the right cast steel piece 3 are connected and fixed through the fixing bolts 4.

[0024] Preferably, the left end of the left cast steel piece 1 is integrally provided with a left connecting flange 13, and the right end of the right cast steel piece 3 is integrally provided with a right connecting flange 33. The right cast steel piece 3 is provided with a liquid inlet channel 34.

[0025] To make the utility model discloses a structure design is more reasonable, as preferred, the middle part of the middle cast steel piece 2 is provided with a medium through hole 23, the medium through hole 23 is provided with a shaft seat 24 in the middle part, a plurality of support rods 25 are fixedly arranged between the inner wall surface of the medium through hole 23 and the shaft seat 24, a positioning shaft 26 is axially arranged in the middle part of the shaft seat 24, and the right end of the positioning shaft 26 is fixedly connected or detachably connected with the shaft seat 24.

[0026] The left end of the middle cast steel piece 2 is fixedly provided with a valve seat 27, and an elastic sealing layer 28 is fixedly arranged on the left end surface of the valve seat 27.

[0027] Preferably, the valve seat 27 is made of stainless steel or hard alloy material, and the valve seat 27 is integrally cast with the middle cast steel piece 2; the middle part of the valve seat 27 is axially provided with a valve seat intermediate through hole, and the valve seat 27 has a ring shape structure; the elastic sealing layer 28 is made of silica gel material or rubber material, the right end surface of the elastic sealing layer 28 is fixedly bonded with the left end of the valve seat 27 through a nail-free adhesive; the middle part of the elastic sealing layer 28 is axially provided with a sealing layer intermediate through hole, the elastic sealing layer 28 has a ring shape structure, and the left end surface of the elastic sealing layer 28 is a sealing surface connected with an existing valve clack.

[0028] The left cast steel piece 1 is internally provided with a liquid outlet channel 14, the middle part of the liquid outlet channel 14 is provided with a spring positioning seat 15, a plurality of support frames 16 are arranged between the spring positioning seat 15 and the inner wall surface of the liquid outlet channel 14, the right end of the spring positioning seat 15 is provided with a spring mounting groove 151 opening to the right, the left inner wall surface of the spring mounting groove 151 is provided with a spring positioning clamping groove 152, and the middle part of the spring positioning seat 15 is axially provided with an axial through hole 153, and the axial center line of the axial through hole 153 is aligned with the axial center line of the positioning shaft 26.

[0029] The number of the support rods 25 is 2-4, and the shaft seat 24, the support rod 25 and the middle cast steel piece 2 are integrally arranged; the right end of the positioning shaft 26 is integrally arranged with the shaft seat 24 or is fixed by bolt connection.

[0030] The number of the support frames 16 is 1-4, and the support frame 16, the spring positioning seat 15 and the left cast steel piece 1 are integrally arranged.

[0031] Preferably, the shaft seat 24, the support rod 25 and the middle cast steel piece 2 are integrally cast; and the support frame 16, the spring positioning seat 15 and the left cast steel piece 1 are integrally cast.

[0032] In actual application, the cast steel piece body includes the left cast steel piece 1, the middle cast steel piece 2 and the right cast steel piece 3, and the left cast steel piece 1, the middle cast steel piece 2 and the right cast steel piece 3 are connected and fixed through the fixing bolts 4. In casting, the left cast steel piece 1, the middle cast steel piece 2 and the right cast steel piece 3 can be separately cast and then assembled into an integrated structure, and the structure design is reasonable, easy to manufacture, convenient to carry and good in practicality.

[0033] The above embodiment is only used for further illustrating the utility model and cannot be understood as limiting the protection scope of the utility model, and some non-essential improvements and adjustments of the utility model by the technical engineers in the field according to the content of the utility model all fall within the protection scope of the utility model.

Claims

1. A high performance ultra-low temperature large size axial flow check valve cast steel piece comprising a cast steel piece body, characterized in that: The cast steel body includes a left cast steel piece (1), a middle cast steel piece (2) and a right cast steel piece (3), the right end of the left cast steel piece (1) is provided with a first positioning groove (11), the left end of the right cast steel piece (3) is provided with a second positioning groove (31), the left end of the middle cast steel piece (2) is inserted into the first positioning groove (11), the right end of the middle cast steel piece (2) is inserted into the second positioning groove (31), the left end of the middle cast steel piece (2) is provided with a plurality of first sealing ring installation grooves (21) at the position of the inner wall surface of the first positioning groove (11), and the right end of the middle cast steel piece (2) is provided with a plurality of second sealing ring installation grooves (22) at the position of the inner wall surface of the second positioning groove (31). The right end of the left cast steel piece (1) is integrally provided with a first connecting flange (12), the left end of the right cast steel piece (3) is integrally provided with a second connecting flange (32), a plurality of fixing bolts (4) are arranged between the first connecting flange (12) and the second connecting flange (32), and the left cast steel piece (1), the middle cast steel piece (2) and the right cast steel piece (3) are connected and fixed through the fixing bolts (4).

2. A high performance ultra-low temperature large size axial flow check valve casting according to claim 1, characterized in that: The middle part of the middle cast steel piece (2) is provided with a medium through hole (23), the middle part of the medium through hole (23) is provided with an axle seat (24), a plurality of support rods (25) are fixedly arranged between the axle seat (24) and the inner wall surface of the medium through hole (23), and the middle part of the axle seat (24) is axially provided with a positioning shaft (26).

3. A high performance ultra-low temperature large size axial flow check valve casting according to claim 2, characterized in that: The left end of the middle cast steel piece (2) is fixedly provided with a valve seat (27), and the left end surface of the valve seat (27) is fixedly provided with an elastic sealing layer (28).

4. A high performance ultra-low temperature large size axial flow check valve casting according to claim 3, characterized in that: The left cast steel piece (1) is provided with a liquid outlet channel (14), the middle part of the liquid outlet channel (14) is provided with a spring positioning seat (15), a plurality of support frames (16) are arranged between the spring positioning seat (15) and the inner wall surface of the liquid outlet channel (14), the right end of the spring positioning seat (15) is provided with a spring installation groove (151) with an opening facing right, the left inner wall surface of the spring installation groove (151) is provided with a spring positioning clamping groove (152), and the middle part of the spring positioning seat (15) is axially provided with an axial through hole (153) with an axial center line aligned with the axial center line of the positioning shaft (26).

5. The high-performance ultra-low-temperature large-sized axial flow check valve cast steel piece according to claim 2 or 4, characterized in that: The number of the support rods (25) is 2-4, and the axle seat (24), the support rod (25) and the middle cast steel piece (2) are integrally arranged; the right end of the positioning shaft (26) is integrally arranged with the axle seat (24) or is fixedly connected through a bolt.

6. A high performance ultra-low temperature large size axial flow check valve casting according to claim 4, wherein: The number of the support frames (16) is 1-4, and the support frame (16), the spring positioning seat (15) and the left cast steel piece (1) are integrally arranged.

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